    indexing
    	description: "[
    		EiffelVision2 rich text. Windows implementation.
    	]"
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date: 2006-10-03 16:38:35 -0700 (Tue, 03 Oct 2006) $"
    	revision: "$Revision: 64102 $"

    class interface
    	EV_RICH_TEXT_IMP

    create
    	make (an_interface: like interface)
    			-- Create `Current' with interface `an_interface'.
    		require -- from EV_ANY_I
    			an_interface_not_void: an_interface /= Void
    		ensure -- from EV_ANY_I
    			interface_assigned: interface = an_interface
    			base_make_called: base_make_called

    feature -- Initialization

    	initialize
    			-- Initialize `Current'.
    			-- (from EV_TEXT_IMP)
    		require -- from  EV_ANY_I
    			True
    		ensure -- from EV_ANY_I
    			is_initialized: is_initialized

    	tooltip: STRING_32
    			-- Text of tooltip assigned to `Current'.
    			-- (from EV_TOOLTIPABLE_IMP)
    		require -- from  EV_TOOLTIPABLE_I
    			True

    feature -- Access

    	accept_cursor: EV_POINTER_STYLE
    			-- Accept cursor set by user.
    			-- To be displayed when the screen pointer is over a target that accepts
    			-- pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	actual_drop_target_agent: FUNCTION [ANY, TUPLE [INTEGER_32, INTEGER_32], EV_ABSTRACT_PICK_AND_DROPABLE]
    			-- Overrides default drop target on a certain position.
    			-- If `Void', will use the default drop target.
    			-- Always void if `Current' is not a widget.
    			-- (from EV_WIDGET_I)

    	awaiting_movement: BOOLEAN
    			-- Are we currently awaiting the movement threshold to
    			-- be reached for as drag and drop or dockable move?
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	capture_enabled: BOOLEAN
    			-- Is the mouse currently captured?
    			-- See constants Capture_xxxx at the end of the class.
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	color_3ddkshadow: INTEGER_32 is 21
    			-- Dark shadow for three-dimensional display elements.
    			--
    			-- Declared in Windows as COLOR_3DDKSHADOW
    			-- (from WEL_COLOR_CONSTANTS)

    	color_3dface: INTEGER_32 is 15
    			-- Face color for three-dimensional display elements and
    			-- for dialog box backgrounds.
    			--
    			-- Declared in Windows as COLOR_3DFACE
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_btnface.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_3dhighlight: INTEGER_32 is 20
    			-- Highlight color for three-dimensional display elements
    			-- (for edges facing the light source.)
    			--
    			-- Declared in Windows as COLOR_3DHILIGHT
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_3dhilight, Color_btnhilight and Color_btnhighlight.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_3dhilight: INTEGER_32 is 20
    			-- Highlight color for three-dimensional display elements
    			-- (for edges facing the light source.)
    			--
    			-- Declared in Windows as COLOR_3DHILIGHT
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_3dhighlight, Color_btnhilight and Color_btnhighlight.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_3dlight: INTEGER_32 is 22
    			-- Light color for three-dimensional display elements
    			-- (for edges facing the light source.)
    			--
    			-- Declared in Windows as COLOR_3DLIGHT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_3dshadow: INTEGER_32 is 16
    			-- Shadow color for three-dimensional display elements
    			-- (for edges facing away from the light source).
    			--
    			-- Declared in Windows as COLOR_3DSHADOW
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_btnshadow.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_activeborder: INTEGER_32 is 10
    			-- Active window border.
    			--
    			-- Declared in Windows as COLOR_ACTIVEBORDER
    			-- (from WEL_COLOR_CONSTANTS)

    	color_activecaption: INTEGER_32 is 2
    			-- Active window title bar.
    			--
    			-- Windows 98/Me, Windows 2000 or later:
    			--   Specifies the left side color in the color gradient of an active
    			--   window's title bar if the gradient effect is enabled.
    			--
    			-- Declared in Windows as COLOR_ACTIVECAPTION
    			-- (from WEL_COLOR_CONSTANTS)

    	color_appworkspace: INTEGER_32 is 12
    			-- Background color of multiple document interface (MDI) applications.
    			--
    			-- Declared in Windows as COLOR_APPWORKSPACE
    			-- (from WEL_COLOR_CONSTANTS)

    	color_background: INTEGER_32 is 1
    			-- Desktop.
    			--
    			-- Declared in Windows as COLOR_BACKGROUND
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_desktop.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_btnface: INTEGER_32 is 15
    			-- Face color for three-dimensional display elements and
    			-- for dialog box backgrounds.
    			--
    			-- Declared in Windows as COLOR_3DFACE
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_3dface.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_btnhighlight: INTEGER_32 is 20
    			-- Highlight color for three-dimensional display elements
    			-- (for edges facing the light source.)
    			--
    			-- Declared in Windows as COLOR_3DHILIGHT
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_3dhilight, Color_3dhighlight and Color_btnhilight.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_btnhilight: INTEGER_32 is 20
    			-- Highlight color for three-dimensional display elements
    			-- (for edges facing the light source.)
    			--
    			-- Declared in Windows as COLOR_3DHILIGHT
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_3dhilight, Color_3dhighlight and Color_btnhighlight.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_btnshadow: INTEGER_32 is 16
    			-- Shadow color for three-dimensional display elements
    			-- (for edges facing away from the light source).
    			--
    			-- Declared in Windows as COLOR_3DSHADOW
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_3dshadow.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_btntext: INTEGER_32 is 18
    			-- Text on push buttons.
    			--
    			-- Declared in Windows as COLOR_BTNTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_captiontext: INTEGER_32 is 9
    			-- Text in caption, size box, and scroll bar arrow box.
    			--
    			-- Declared in Windows as COLOR_CAPTIONTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_desktop: INTEGER_32 is 1
    			-- Desktop.
    			--
    			-- Declared in Windows as COLOR_BACKGROUND
    			-- Was declared in WEL_COLOR_CONSTANTS as synonym of Color_background.
    			-- (from WEL_COLOR_CONSTANTS)

    	color_gradientactivecaption: INTEGER_32 is 27
    			-- Windows 98/Me, Windows 2000 or later:
    			--   Right side color in the color gradient of an active window's
    			--   title bar. COLOR_ACTIVECAPTION specifies the left side color.
    			--   Use SPI_GETGRADIENTCAPTIONS with the SystemParametersInfo
    			--   function to determine whether the gradient effect is enabled.
    			--
    			-- Declared in Windows as COLOR_GRADIENTACTIVECAPTION
    			-- (from WEL_COLOR_CONSTANTS)

    	color_gradientinactivecaption: INTEGER_32 is 28
    			-- Windows 98/Me, Windows 2000 or later:
    			--   Right side color in the color gradient of an inactive window's
    			--   title bar. COLOR_INACTIVECAPTION specifies the left side color.
    			--
    			-- Declared in Windows as COLOR_GRADIENTINACTIVECAPTION
    			-- (from WEL_COLOR_CONSTANTS)

    	color_graytext: INTEGER_32 is 17
    			-- Grayed (disabled) text. This color is set to 0 if the current
    			-- display driver does not support a solid gray color.
    			--
    			-- Declared in Windows as COLOR_GRAYTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_highlight: INTEGER_32 is 13
    			-- Item(s) selected in a control.
    			--
    			-- Declared in Windows as COLOR_HIGHLIGHT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_highlighttext: INTEGER_32 is 14
    			-- Text of item(s) selected in a control.
    			--
    			-- Declared in Windows as COLOR_HIGHLIGHTTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_hotlight: INTEGER_32 is 26
    			-- Windows 98/Me, Windows 2000 or later:
    			--   Color for a hot-tracked item. Single clicking a hot-tracked
    			--   item executes the item.
    			--
    			-- Declared in Windows as COLOR_HOTLIGHT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_inactiveborder: INTEGER_32 is 11
    			-- Inactive window border.
    			--
    			-- Declared in Windows as COLOR_INACTIVEBORDER
    			-- (from WEL_COLOR_CONSTANTS)

    	color_inactivecaption: INTEGER_32 is 3
    			-- Inactive window caption.
    			--
    			-- Windows 98/Me, Windows 2000 or later:
    			--   Specifies the left side color in the color gradient of an inactive
    			--   window's title bar if the gradient effect is enabled.
    			--
    			-- Declared in Windows as COLOR_INACTIVECAPTION
    			-- (from WEL_COLOR_CONSTANTS)

    	color_inactivecaptiontext: INTEGER_32 is 19
    			-- Color of text in an inactive caption.
    			--
    			-- Declared in Windows as COLOR_INACTIVECAPTIONTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_infobk: INTEGER_32 is 24
    			-- Background color for tooltip controls.
    			--
    			-- Declared in Windows as COLOR_INFOBK
    			-- (from WEL_COLOR_CONSTANTS)

    	color_infotext: INTEGER_32 is 23
    			-- Text color for tooltip controls.
    			--
    			-- Declared in Windows as COLOR_INFOTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_menu: INTEGER_32 is 4
    			-- Menu background.
    			--
    			-- Declared in Windows as COLOR_MENU
    			-- (from WEL_COLOR_CONSTANTS)

    	color_menubar: INTEGER_32 is 30
    			-- Windows XP:
    			--   The background color for the menu bar when menus appear as
    			--   flat menus (see SystemParametersInfo). However, Color_menu
    			--   continues to specify the background color of the menu popup.
    			--
    			-- Declared in Windows as COLOR_MENUBAR
    			-- (from WEL_COLOR_CONSTANTS)

    	color_menuhilight: INTEGER_32 is 29
    			-- Windows XP:
    			--   The color used to highlight menu items when the menu appears
    			--   as a flat menu (see SystemParametersInfo). The highlighted
    			--   menu item is outlined with COLOR_HIGHLIGHT.
    			--
    			-- Declared in Windows as COLOR_MENUHILIGHT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_menutext: INTEGER_32 is 7
    			-- Text in menus.
    			--
    			-- Declared in Windows as COLOR_MENUTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	color_scrollbar: INTEGER_32 is 0
    			-- Scroll bar gray area.
    			--
    			-- Declared in Windows as COLOR_SCROLLBAR
    			-- (from WEL_COLOR_CONSTANTS)

    	color_window: INTEGER_32 is 5
    			-- Window background.
    			--
    			-- Declared in Windows as COLOR_WINDOW
    			-- (from WEL_COLOR_CONSTANTS)

    	color_windowframe: INTEGER_32 is 6
    			-- Window frame.
    			--
    			-- Declared in Windows as COLOR_WINDOWFRAME
    			-- (from WEL_COLOR_CONSTANTS)

    	color_windowtext: INTEGER_32 is 8
    			-- Text in windows.
    			--
    			-- Declared in Windows as COLOR_WINDOWTEXT
    			-- (from WEL_COLOR_CONSTANTS)

    	commands: WEL_COMMAND_MANAGER
    			-- Command manager associated to the current window.
    			-- (from WEL_WINDOW)

    	cursor_on_widget: CELL [EV_WIDGET_IMP]
    			-- This cell contains the widget_imp that currently
    			-- has the pointer of the mouse. As it is a once
    			-- feature, it is a shared data.
    			-- it is used for the `mouse_enter' and `mouse_leave'
    			-- events.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_IMP
    			True
    		ensure then -- from EV_WIDGET_IMP
    			result_exists: Result /= Void

    	default_key_processing_handler: PREDICATE [ANY, TUPLE [EV_KEY]]
    			-- Agent used to determine whether the default key processing should occur for `Current'.
    			-- If agent returns `True' then default key processing continues as normal, False prevents
    			-- default key processing from occuring.
    			-- (from EV_WIDGET_I)

    	default_parent: EV_INTERNAL_SILLY_WINDOW_IMP
    			-- A default parent for creation of `Current'.
    			-- (from EV_WIDGET_IMP)
    		ensure -- from EV_WIDGET_IMP
    			valid_parent: Result /= Void

    	default_processing: BOOLEAN
    			-- (from WEL_RETURN_VALUE)

    	deny_cursor: EV_POINTER_STYLE
    			-- Deny cursor set by user.
    			-- To be displayed when the screen pointer is not over a valid target.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	drag_and_drop_starting_movement: INTEGER_32 is 3
    			-- Pointer movement in pixels required to start a drag and drop.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	ev_set_minimum_height (value: INTEGER_32)
    			-- Make `value' the new minimum_height of `Current'.
    			-- Should check if the user didn't set the minimum width
    			-- before setting a new value.
    			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True

    	ev_set_minimum_size (mw, mh: INTEGER_32)
    			-- Make `mw' the new minimum_width and `mh' the new
    			-- minimum_height of `Current'.
    			-- Should check if the user didn't set the minimum width
    			-- before setting a new value.
    			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True

    	ev_set_minimum_width (value: INTEGER_32)
    			-- Make `value' the new minimum_width of `Current'.
    			-- Should check if the user didn't set the minimum width
    			-- before setting a new value.
    			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True

    	focus_on_widget: CELL [EV_WIDGET_IMP]
    			-- Widget that has currently the focus.
    			-- (from EV_WIDGET_IMP)

    	font: EV_FONT
    			-- Font of `Current'.
    			-- (from EV_FONTABLE_IMP)
    		require -- from  EV_FONTABLE_I
    			True
    		ensure -- from EV_FONTABLE_I
    			not_void: Result /= Void

    	wel_font: WEL_FONT
    			-- Font with which the control is drawing its text.
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			exists: exists
    		ensure -- from WEL_CONTROL
    			result_not_void: Result /= Void

    	foreground_color: EV_COLOR
    			-- Color used for the foreground of `Current'.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_COLORIZABLE_I
    			True

    	generating_type: STRING_8
    			-- Name of current object's generating type
    			-- (type of which it is a direct instance)
    			-- (from ANY)

    	generator: STRING_8
    			-- Name of current object's generating class
    			-- (base class of the type of which it is a direct instance)
    			-- (from ANY)

    	has_return_value: BOOLEAN
    			-- Should the window procedure return a value?
    			-- (from WEL_RETURN_VALUE)

    	has_word_wrapping: BOOLEAN
    			-- Is word wrapping enabled?
    			-- If enabled, lines that are too long to be displayed
    			-- in `Current' will be wrapped onto new lines.
    			-- If disabled, a horizontal scroll bar will be displayed
    			-- and lines will not be wrapped.
    			-- (from EV_TEXT_IMP)
    		require -- from  EV_TEXT_I
    			True

    	height: INTEGER_32
    			-- Height of `Current'.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from  EV_POSITIONED_I
    			True

    	help_context: FUNCTION [ANY, TUPLE, EV_HELP_CONTEXT]
    			-- Agent that evaluates to help context sent to help engine when help is requested
    			-- (from EV_HELP_CONTEXTABLE_I)
    		ensure -- from EV_HELP_CONTEXTABLE_I
    			current_if_exists: internal_help_context /= Void implies Result = internal_help_context

    	id: INTEGER_32
    			-- Control id
    			-- (from WEL_CONTROL)

    	insert_text (txt: STRING_GENERAL)
    			-- Insert `txt' at caret_position.
    			-- (from EV_TEXT_IMP)
    		require -- from EV_TEXT_COMPONENT_I
    			valid_text: txt /= Void
    		require -- from  WEL_RICH_EDIT
    			True

    	internal_font: EV_FONT
    			-- Font of `Current' for internal queries.
    			-- Faster than calling font as we do not need to
    			-- create a new EV_FONT every time.
    			-- (from EV_FONTABLE_IMP)

    	internal_font_height: INTEGER_32
    			-- Height required to correctly display font of `Current' in pixels.
    			-- (from EV_FONTABLE_IMP)
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True
    		ensure -- from EV_FONTABLE_IMP
    			result_non_negative: Result >= 0

    	internal_pointer_style: EV_POINTER_STYLE
    			-- Cursor displayed when screen pointer is over current widget,
    			-- as seen from interface.
    			-- (from EV_WIDGET_I)

    	is_dock_executing: BOOLEAN
    			-- Is `Current' in the process of a dockable transport?
    			-- (from EV_DOCKABLE_SOURCE_I)

    	is_dockable: BOOLEAN
    			-- Is `Current' dockable?
    			-- (from EV_DOCKABLE_SOURCE_I)

    	is_external_docking_enabled: BOOLEAN
    			-- Is `Current' able to be docked into an EV_DOCKABLE_DIALOG
    			-- When there is no valid EV_DRAGABLE_TARGET upon completion
    			-- of the transport?
    			-- (from EV_DOCKABLE_SOURCE_I)

    	is_external_docking_relative: BOOLEAN
    			-- Will dockable dialog displayed when `Current' is docked externally
    			-- be displayed relative to parent window of `Current'?
    			-- Otherwise displayed as a standard window.
    			-- (from EV_DOCKABLE_SOURCE_I)

    	wel_item: POINTER
    			-- Generic Windows handle or structure pointer.
    			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
    			-- (from WEL_ANY)

    	key_code_from_key_string (key_string: STRING_GENERAL): INTEGER_32
    			-- Key code value from `key_string'
    			-- (from EV_KEY_CONSTANTS)
    		require -- from EV_KEY_CONSTANTS
    			key_string_not_void: key_string /= Void

    	key_strings: ARRAY [STRING_32]
    			-- String representations of all key codes.
    			-- (from EV_KEY_CONSTANTS)

    	line (i: INTEGER_32): STRING_32
    			-- `Result' is content of the `i'th line.
    			-- (from EV_TEXT_IMP)
    		require -- from EV_TEXT_I
    			valid_line: valid_line_index (i)
    		ensure -- from EV_TEXT_I
    			result_not_void: Result /= Void

    	line_count: INTEGER_32
    			-- Number of lines of text in `Current'.
    			-- (from EV_TEXT_IMP)
    		require -- from  EV_TEXT_I
    			True
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from EV_TEXT_I
    			result_greater_zero: Result > 0
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0

    	wel_line_count: INTEGER_32
    			-- Number of lines of text in `Current'.
    			-- (from EV_TEXT_IMP)
    		ensure -- from EV_TEXT_I
    			result_greater_zero: Result > 0

    	message_return_value: POINTER
    			-- Return value of the window procedure.
    			-- (from WEL_RETURN_VALUE)
    		require -- from WEL_RETURN_VALUE
    			has_return_value: has_return_value

    	minimum_height: INTEGER_32
    			-- Lower bound on height in pixels.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from  EV_POSITIONED_I
    			True

    	minimum_width: INTEGER_32
    			-- Lower bound on width in pixels.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from  EV_POSITIONED_I
    			True

    	not_external_docking_enabled: BOOLEAN
    			-- Attribute used for `is_externally_dockable'. We must implement
    			-- `is_externally_dockable' this way as we have no easy solution to
    			-- assign `True' to `is_externally_dockable'.
    			-- (from EV_DOCKABLE_SOURCE_I)

    	not_is_external_docking_relative: BOOLEAN
    			-- Will dockable dialog displayed when `Current' is docked externally
    			-- be displayed relative to parent window of `Current'?
    			-- Otherwise displayed as a standard window.
    			-- Internal reversed value of is_external_docking_relative as we cannot
    			-- easily initialize a BOOLE to True in this case.
    			-- (from EV_DOCKABLE_SOURCE_I)

    	original_parent_position: INTEGER_32
    			-- Original position in parent. Required
    			-- to restore widget later.
    			-- (from EV_DOCKABLE_SOURCE_I)

    	original_pressure: REAL_64
    			-- Hold the values passed to start transport so when a transport
    			-- actually starts, with real_start_transport,these can be passed
    			-- as arguments.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_x: INTEGER_32
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_x_tilt: REAL_64
    			-- Hold the values passed to start transport so when a transport
    			-- actually starts, with real_start_transport,these can be passed
    			-- as arguments.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_y: INTEGER_32
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_y_tilt: REAL_64
    			-- Hold the values passed to start transport so when a transport
    			-- actually starts, with real_start_transport,these can be passed
    			-- as arguments.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	parent: EV_CONTAINER
    			-- Parent of `Current'
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True

    	wel_parent: WEL_WINDOW
    			-- Parent window
    			-- (from WEL_WINDOW)

    	pebble: ANY
    			-- Data to be transported by pick and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_function: FUNCTION [ANY, TUPLE, ANY]
    			-- Returns data to be transported by pick and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_positioning_enabled: BOOLEAN
    			-- If `True' then pick and drop start coordinates are
    			-- pebble_x_position, pebble_y_position.
    			-- If `False' then pick and drop start coordinates are
    			-- the pointer coordinates.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_x_position: INTEGER_32
    			-- Initial x position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_y_position: INTEGER_32
    			-- Initial y position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pointer_position: EV_COORDINATE
    			-- Position of the screen pointer relative to `Current'.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True
    		ensure -- from EV_WIDGET_I
    			result_not_void: Result /= Void

    	pointer_style: EV_POINTER_STYLE
    			-- Pointer displayed when the pointing device is over `Current'.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_DOCKABLE_SOURCE_IMP
    			True
    		require -- from  EV_WIDGET_I
    			True

    	real_source: EV_DOCKABLE_SOURCE
    			-- `Result' is EV_DOCKABLE_SOURCE which should be
    			-- dragged when docking begins on `Current'.
    			-- (from EV_DOCKABLE_SOURCE_I)

    	real_target: EV_DOCKABLE_TARGET
    			-- `Result' is target used during a dockable transport if
    			-- mouse pointer is above `Current'.
    			-- (from EV_WIDGET_I)

    	screen_x: INTEGER_32
    			-- Horizontal offset of `Current' relative to screen
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_POSITIONED_I
    			True

    	screen_y: INTEGER_32
    			-- Vertical offset of `Current' relative to screen.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_POSITIONED_I
    			True

    	top_level_window: EV_WINDOW
    			-- Top level window that contains `Current'.
    			-- (from EV_WIDGET_IMP)

    	top_level_window_imp: EV_WINDOW_IMP
    			-- Top level window that contains `Current'.
    			-- (from EV_PRIMITIVE_IMP)

    	transport_executing: BOOLEAN
    			-- Is a pick and drop or drag and drop currently
    			-- being executed?
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	vk_0: INTEGER_32 is 48
    			-- (from WEL_VK_CONSTANTS)

    	vk_1: INTEGER_32 is 49
    			-- (from WEL_VK_CONSTANTS)

    	vk_2: INTEGER_32 is 50
    			-- (from WEL_VK_CONSTANTS)

    	vk_3: INTEGER_32 is 51
    			-- (from WEL_VK_CONSTANTS)

    	vk_4: INTEGER_32 is 52
    			-- (from WEL_VK_CONSTANTS)

    	vk_5: INTEGER_32 is 53
    			-- (from WEL_VK_CONSTANTS)

    	vk_6: INTEGER_32 is 54
    			-- (from WEL_VK_CONSTANTS)

    	vk_7: INTEGER_32 is 55
    			-- (from WEL_VK_CONSTANTS)

    	vk_8: INTEGER_32 is 56
    			-- (from WEL_VK_CONSTANTS)

    	vk_9: INTEGER_32 is 57
    			-- Vk_a thru Vk_z are the same as their ASCII equivalents: 'A' thru 'Z'.
    			-- (from WEL_VK_CONSTANTS)

    	vk_a: INTEGER_32 is 65
    			-- (from WEL_VK_CONSTANTS)

    	vk_add: INTEGER_32 is 107
    			-- Declared in Windows as VK_ADD
    			-- (from WEL_VK_CONSTANTS)

    	vk_alt: INTEGER_32 is 18
    			-- Declared in Windows as VK_MENU
    			-- Was declared in WEL_VK_CONSTANTS as synonym of Vk_menu.
    			-- (from WEL_VK_CONSTANTS)

    	vk_apps: INTEGER_32 is 93
    			-- Declared in Windows as VK_APPS
    			-- Vk_0 thru Vk_9 are the same as their ASCII equivalents: '0' thru '9'.
    			-- (from WEL_VK_CONSTANTS)

    	vk_b: INTEGER_32 is 66
    			-- (from WEL_VK_CONSTANTS)

    	vk_back: INTEGER_32 is 8
    			-- Declared in Windows as VK_BACK
    			-- (from WEL_VK_CONSTANTS)

    	vk_c: INTEGER_32 is 67
    			-- (from WEL_VK_CONSTANTS)

    	vk_cancel: INTEGER_32 is 3
    			-- Declared in Windows as VK_CANCEL
    			-- (from WEL_VK_CONSTANTS)

    	vk_capital: INTEGER_32 is 20
    			-- Declared in Windows as VK_CAPITAL
    			-- (from WEL_VK_CONSTANTS)

    	vk_clear: INTEGER_32 is 12
    			-- Declared in Windows as VK_CLEAR
    			-- (from WEL_VK_CONSTANTS)

    	vk_control: INTEGER_32 is 17
    			-- Declared in Windows as VK_CONTROL
    			-- (from WEL_VK_CONSTANTS)

    	vk_d: INTEGER_32 is 68
    			-- (from WEL_VK_CONSTANTS)

    	vk_decimal: INTEGER_32 is 110
    			-- Declared in Windows as VK_DECIMAL
    			-- (from WEL_VK_CONSTANTS)

    	vk_delete: INTEGER_32 is 46
    			-- Declared in Windows as VK_DELETE
    			-- (from WEL_VK_CONSTANTS)

    	vk_divide: INTEGER_32 is 111
    			-- Declared in Windows as VK_DIVIDE
    			-- (from WEL_VK_CONSTANTS)

    	vk_down: INTEGER_32 is 40
    			-- Declared in Windows as VK_DOWN
    			-- (from WEL_VK_CONSTANTS)

    	vk_e: INTEGER_32 is 69
    			-- (from WEL_VK_CONSTANTS)

    	vk_end: INTEGER_32 is 35
    			-- Declared in Windows as VK_END
    			-- (from WEL_VK_CONSTANTS)

    	vk_escape: INTEGER_32 is 27
    			-- Declared in Windows as VK_ESCAPE
    			-- (from WEL_VK_CONSTANTS)

    	vk_execute: INTEGER_32 is 43
    			-- Declared in Windows as VK_EXECUTE
    			-- (from WEL_VK_CONSTANTS)

    	vk_f: INTEGER_32 is 70
    			-- (from WEL_VK_CONSTANTS)

    	vk_f1: INTEGER_32 is 112
    			-- Declared in Windows as VK_F1
    			-- (from WEL_VK_CONSTANTS)

    	vk_f10: INTEGER_32 is 121
    			-- Declared in Windows as VK_F10
    			-- (from WEL_VK_CONSTANTS)

    	vk_f11: INTEGER_32 is 122
    			-- Declared in Windows as VK_F11
    			-- (from WEL_VK_CONSTANTS)

    	vk_f12: INTEGER_32 is 123
    			-- Declared in Windows as VK_F12
    			-- (from WEL_VK_CONSTANTS)

    	vk_f13: INTEGER_32 is 124
    			-- Declared in Windows as VK_F13
    			-- (from WEL_VK_CONSTANTS)

    	vk_f14: INTEGER_32 is 125
    			-- Declared in Windows as VK_F14
    			-- (from WEL_VK_CONSTANTS)

    	vk_f15: INTEGER_32 is 126
    			-- Declared in Windows as VK_F15
    			-- (from WEL_VK_CONSTANTS)

    	vk_f16: INTEGER_32 is 127
    			-- Declared in Windows as VK_F16
    			-- (from WEL_VK_CONSTANTS)

    	vk_f17: INTEGER_32 is 128
    			-- Declared in Windows as VK_F17
    			-- (from WEL_VK_CONSTANTS)

    	vk_f18: INTEGER_32 is 129
    			-- Declared in Windows as VK_F18
    			-- (from WEL_VK_CONSTANTS)

    	vk_f19: INTEGER_32 is 130
    			-- Declared in Windows as VK_F19
    			-- (from WEL_VK_CONSTANTS)

    	vk_f2: INTEGER_32 is 113
    			-- Declared in Windows as VK_F2
    			-- (from WEL_VK_CONSTANTS)

    	vk_f20: INTEGER_32 is 131
    			-- Declared in Windows as VK_F20
    			-- (from WEL_VK_CONSTANTS)

    	vk_f21: INTEGER_32 is 132
    			-- Declared in Windows as VK_F21
    			-- (from WEL_VK_CONSTANTS)

    	vk_f22: INTEGER_32 is 133
    			-- Declared in Windows as VK_F22
    			-- (from WEL_VK_CONSTANTS)

    	vk_f23: INTEGER_32 is 134
    			-- Declared in Windows as VK_F23
    			-- (from WEL_VK_CONSTANTS)

    	vk_f24: INTEGER_32 is 135
    			-- Declared in Windows as VK_F24
    			-- (from WEL_VK_CONSTANTS)

    	vk_f3: INTEGER_32 is 114
    			-- Declared in Windows as VK_F3
    			-- (from WEL_VK_CONSTANTS)

    	vk_f4: INTEGER_32 is 115
    			-- Declared in Windows as VK_F4
    			-- (from WEL_VK_CONSTANTS)

    	vk_f5: INTEGER_32 is 116
    			-- Declared in Windows as VK_F5
    			-- (from WEL_VK_CONSTANTS)

    	vk_f6: INTEGER_32 is 117
    			-- Declared in Windows as VK_F6
    			-- (from WEL_VK_CONSTANTS)

    	vk_f7: INTEGER_32 is 118
    			-- Declared in Windows as VK_F7
    			-- (from WEL_VK_CONSTANTS)

    	vk_f8: INTEGER_32 is 119
    			-- Declared in Windows as VK_F8
    			-- (from WEL_VK_CONSTANTS)

    	vk_f9: INTEGER_32 is 120
    			-- Declared in Windows as VK_F9
    			-- (from WEL_VK_CONSTANTS)

    	vk_g: INTEGER_32 is 71
    			-- (from WEL_VK_CONSTANTS)

    	vk_h: INTEGER_32 is 72
    			-- (from WEL_VK_CONSTANTS)

    	vk_help: INTEGER_32 is 47
    			-- Declared in Windows as VK_HELP
    			-- (from WEL_VK_CONSTANTS)

    	vk_home: INTEGER_32 is 36
    			-- Declared in Windows as VK_HOME
    			-- (from WEL_VK_CONSTANTS)

    	vk_i: INTEGER_32 is 73
    			-- (from WEL_VK_CONSTANTS)

    	vk_insert: INTEGER_32 is 45
    			-- Declared in Windows as VK_INSERT
    			-- (from WEL_VK_CONSTANTS)

    	vk_j: INTEGER_32 is 74
    			-- (from WEL_VK_CONSTANTS)

    	vk_k: INTEGER_32 is 75
    			-- (from WEL_VK_CONSTANTS)

    	vk_l: INTEGER_32 is 76
    			-- (from WEL_VK_CONSTANTS)

    	vk_lbutton: INTEGER_32 is 1
    			-- Declared in Windows as VK_LBUTTON
    			-- (from WEL_VK_CONSTANTS)

    	vk_lcontrol: INTEGER_32 is 162
    			-- Declared in Windows as VK_LCONTROL
    			-- (from WEL_VK_CONSTANTS)

    	vk_left: INTEGER_32 is 37
    			-- Declared in Windows as VK_LEFT
    			-- (from WEL_VK_CONSTANTS)

    	vk_lmenu: INTEGER_32 is 164
    			-- Declared in Windows as VK_LMENU
    			-- (from WEL_VK_CONSTANTS)

    	vk_lshift: INTEGER_32 is 160
    			-- Declared in Windows as VK_LSHIFT
    			-- (from WEL_VK_CONSTANTS)

    	vk_m: INTEGER_32 is 77
    			-- (from WEL_VK_CONSTANTS)

    	vk_mbutton: INTEGER_32 is 4
    			-- Declared in Windows as VK_MBUTTON
    			-- (from WEL_VK_CONSTANTS)

    	vk_menu: INTEGER_32 is 18
    			-- Declared in Windows as VK_MENU
    			-- Was declared in WEL_VK_CONSTANTS as synonym of Vk_alt.
    			-- (from WEL_VK_CONSTANTS)

    	vk_multiply: INTEGER_32 is 106
    			-- Declared in Windows as VK_MULTIPLY
    			-- (from WEL_VK_CONSTANTS)

    	vk_n: INTEGER_32 is 78
    			-- (from WEL_VK_CONSTANTS)

    	vk_next: INTEGER_32 is 34
    			-- Declared in Windows as VK_NEXT
    			-- (from WEL_VK_CONSTANTS)

    	vk_numlock: INTEGER_32 is 144
    			-- Declared in Windows as VK_NUMLOCK
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad0: INTEGER_32 is 96
    			-- Declared in Windows as VK_NUMPAD0
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad1: INTEGER_32 is 97
    			-- Declared in Windows as VK_NUMPAD1
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad2: INTEGER_32 is 98
    			-- Declared in Windows as VK_NUMPAD2
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad3: INTEGER_32 is 99
    			-- Declared in Windows as VK_NUMPAD3
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad4: INTEGER_32 is 100
    			-- Declared in Windows as VK_NUMPAD4
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad5: INTEGER_32 is 101
    			-- Declared in Windows as VK_NUMPAD5
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad6: INTEGER_32 is 102
    			-- Declared in Windows as VK_NUMPAD6
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad7: INTEGER_32 is 103
    			-- Declared in Windows as VK_NUMPAD7
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad8: INTEGER_32 is 104
    			-- Declared in Windows as VK_NUMPAD8
    			-- (from WEL_VK_CONSTANTS)

    	vk_numpad9: INTEGER_32 is 105
    			-- Declared in Windows as VK_NUMPAD9
    			-- (from WEL_VK_CONSTANTS)

    	vk_o: INTEGER_32 is 79
    			-- (from WEL_VK_CONSTANTS)

    	vk_p: INTEGER_32 is 80
    			-- (from WEL_VK_CONSTANTS)

    	vk_pause: INTEGER_32 is 19
    			-- Declared in Windows as VK_PAUSE
    			-- (from WEL_VK_CONSTANTS)

    	vk_print: INTEGER_32 is 42
    			-- Declared in Windows as VK_PRINT
    			-- (from WEL_VK_CONSTANTS)

    	vk_prior: INTEGER_32 is 33
    			-- Declared in Windows as VK_PRIOR
    			-- (from WEL_VK_CONSTANTS)

    	vk_q: INTEGER_32 is 81
    			-- (from WEL_VK_CONSTANTS)

    	vk_r: INTEGER_32 is 82
    			-- (from WEL_VK_CONSTANTS)

    	vk_rbutton: INTEGER_32 is 2
    			-- Declared in Windows as VK_RBUTTON
    			-- (from WEL_VK_CONSTANTS)

    	vk_rcontrol: INTEGER_32 is 163
    			-- Declared in Windows as VK_RCONTROL
    			-- (from WEL_VK_CONSTANTS)

    	vk_return: INTEGER_32 is 13
    			-- Declared in Windows as VK_RETURN
    			-- (from WEL_VK_CONSTANTS)

    	vk_right: INTEGER_32 is 39
    			-- Declared in Windows as VK_RIGHT
    			-- (from WEL_VK_CONSTANTS)

    	vk_rmenu: INTEGER_32 is 165
    			-- Declared in Windows as VK_RMENU
    			-- (from WEL_VK_CONSTANTS)

    	vk_rshift: INTEGER_32 is 161
    			-- Declared in Windows as VK_RSHIFT
    			-- (from WEL_VK_CONSTANTS)

    	vk_s: INTEGER_32 is 83
    			-- (from WEL_VK_CONSTANTS)

    	vk_scroll: INTEGER_32 is 145
    			-- Declared in Windows as VK_SCROLL
    			-- (from WEL_VK_CONSTANTS)

    	vk_select: INTEGER_32 is 41
    			-- Declared in Windows as VK_SELECT
    			-- (from WEL_VK_CONSTANTS)

    	vk_separator: INTEGER_32 is 108
    			-- Declared in Windows as VK_SEPARATOR
    			-- (from WEL_VK_CONSTANTS)

    	vk_shift: INTEGER_32 is 16
    			-- Declared in Windows as VK_SHIFT
    			-- (from WEL_VK_CONSTANTS)

    	vk_snapshot: INTEGER_32 is 44
    			-- Declared in Windows as VK_SNAPSHOT
    			-- (from WEL_VK_CONSTANTS)

    	vk_space: INTEGER_32 is 32
    			-- Declared in Windows as VK_SPACE
    			-- (from WEL_VK_CONSTANTS)

    	vk_subtract: INTEGER_32 is 109
    			-- Declared in Windows as VK_SUBTRACT
    			-- (from WEL_VK_CONSTANTS)

    	vk_t: INTEGER_32 is 84
    			-- (from WEL_VK_CONSTANTS)

    	vk_tab: INTEGER_32 is 9
    			-- Declared in Windows as VK_TAB
    			-- (from WEL_VK_CONSTANTS)

    	vk_u: INTEGER_32 is 85
    			-- (from WEL_VK_CONSTANTS)

    	vk_up: INTEGER_32 is 38
    			-- Declared in Windows as VK_UP
    			-- (from WEL_VK_CONSTANTS)

    	vk_v: INTEGER_32 is 86
    			-- (from WEL_VK_CONSTANTS)

    	vk_w: INTEGER_32 is 87
    			-- (from WEL_VK_CONSTANTS)

    	vk_x: INTEGER_32 is 88
    			-- (from WEL_VK_CONSTANTS)

    	vk_y: INTEGER_32 is 89
    			-- (from WEL_VK_CONSTANTS)

    	vk_z: INTEGER_32 is 90
    			-- (from WEL_VK_CONSTANTS)

    	widget_imp_at_pointer_position: EV_WIDGET_IMP
    			-- `Result' is implementation of widget at current
    			-- pointer position or Void if none.
    			-- (from EV_SHARED_TRANSPORT_IMP)
    		require -- from  EV_DOCKABLE_SOURCE_I
    			True

    	width: INTEGER_32
    			-- Width of `Current'.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from  EV_POSITIONED_I
    			True

    	x_position: INTEGER_32
    			-- `Result' is x_position of `Current' in pixels.
    			-- If wel_parent not Void then `Result' is relative to wel_parent else
    			-- `Result' is relative to screen.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from  EV_POSITIONED_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			wel_parent = Void implies Result = absolute_x

    	y_position: INTEGER_32
    			-- `Result' is x_position of `Current' in pixels.
    			-- If wel_parent not Void then `Result' is relative to wel_parent else
    			-- `Result' is relative to screen.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from  EV_POSITIONED_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			wel_parent = Void implies Result = absolute_y

    feature -- Comparison

    	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void
    			-- or attached to isomorphic object structures?
    			-- (from ANY)
    		ensure -- from ANY
    			shallow_implies_deep: standard_equal (some, other) implies Result
    			both_or_none_void: (some = Void) implies (Result = (other = Void))
    			same_type: (Result and (some /= Void)) implies some.same_type (other)
    			symmetric: Result implies deep_equal (other, some)

    	frozen equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached
    			-- to objects considered equal?
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

    	is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object considered
    			-- equal to current object?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			symmetric: Result implies other.is_equal (Current)
    			consistent: standard_is_equal (other) implies Result

    	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached to
    			-- field-by-field identical objects of the same type?
    			-- Always uses default object comparison criterion.
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

    	frozen standard_is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object of the same type
    			-- as current object, and field-by-field identical to it?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			same_type: Result implies same_type (other)
    			symmetric: Result implies other.standard_is_equal (Current)

    feature -- Status report

    	absolute_x: INTEGER_32
    			-- Absolute x position
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			Result = window_rect.x

    	absolute_y: INTEGER_32
    			-- Absolute y position
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			Result = window_rect.y

    	buffer_locked_in_append_mode: BOOLEAN
    			-- Is buffered appending underway?
    			-- (from EV_RICH_TEXT_I)

    	buffer_locked_in_format_mode: BOOLEAN
    			-- Is buffered formatting underway?
    			-- (from EV_RICH_TEXT_I)

    	can_undo: BOOLEAN
    			-- Can the last operation be undone?
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	captured_window: WEL_WINDOW
    			-- Current window which has been captured.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			window_captured: window_captured

    	internal_caret_position: INTEGER_32
    			-- (from WEL_RICH_EDIT)
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True
    		require -- from WEL_EDIT
    			exists: exists

    	caret_position: INTEGER_32
    			-- Current position of caret.
    		require -- from  EV_TEXT_COMPONENT_I
    			True

    	character_displayed (an_index: INTEGER_32): BOOLEAN
    			-- Is character `an_index' currently visible in `Current'?
    		require -- from EV_RICH_TEXT_I
    			index_valid: an_index >= 1 and an_index <= text_length
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	character_format (caret_index: INTEGER_32): EV_CHARACTER_FORMAT
    			-- `Result' is character format at caret position `caret_index'
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: caret_index >= 1 and caret_index <= text_length + 1
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	character_format_contiguous (start_index, end_index: INTEGER_32): BOOLEAN
    			-- Is formatting from caret position `start_index' to `end_index' contiguous?
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: start_index >= 1 and end_index <= text_length + 1 and start_index <= end_index
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	character_format_range_information (start_index, end_index: INTEGER_32): EV_CHARACTER_FORMAT_RANGE_INFORMATION
    			-- Formatting range information from caret position `start_index' to `end_index'.
    			-- All attributes in `Result' are set to `True' if they remain consitent from `start_index' to
    			--`end_index' and `False' otherwise.
    			-- `Result' is a snapshot of `Current', and does not remain consistent as the contents
    			-- are subsequently changed.
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: start_index >= 1 and end_index <= text_length + 1 and start_index <= end_index
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	character_index_from_position (a_x, a_y: INTEGER_32): INTEGER_32
    			-- Zero-based character index of the character which is
    			-- the nearest to `a_x' and `a_y' position in the client
    			-- area.
    			-- A returned coordinate can be negative if the
    			-- character has been scrolled outside the edit
    			-- control's client area. The coordinates are truncated
    			-- to integer values and are in screen units relative
    			-- to the upper-left corner of the client area of the
    			-- control.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			a_x_large_enough: a_x >= 0
    			a_y_large_enough: a_y >= 0

    	client_rect: WEL_RECT
    			-- Client rectangle
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			result_not_void: Result /= Void

    	closest_dockable_target: EV_DOCKABLE_TARGET
    			-- `Result' is first dockable target that is_dockable found by recursively
    			-- searching up through the parenting structure from the widget
    			-- currently underneath the pointer position.
    			-- `Result' will be `Void' if a dockable target is not found.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			result_is_dockable: Result /= Void implies Result.is_docking_enabled

    	command (message: INTEGER_32): WEL_COMMAND
    			-- Command associated to `message'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			positive_message: message >= 0
    			command_exists: command_exists (message)
    		ensure -- from WEL_WINDOW
    			result_not_void: Result /= Void

    	command_argument (message: INTEGER_32): ANY
    			-- Command argument associated to `message'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			positive_message: message >= 0
    			command_exists: command_exists (message)

    	command_exists (message: INTEGER_32): BOOLEAN
    			-- Does a command associated to `message' exist?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			positive_message: message >= 0

    	commands_enabled: BOOLEAN
    			-- Is the commands execution enabled?
    			-- (from WEL_WINDOW)

    	complete_loading
    			-- Restore `Current' back to its default state before last call
    			-- to initialize_for_loading.

    	complete_saving
    			-- Restore `Current' back to its default state before last call
    			-- to initialize_for_saving.

    	conforms_to (other: ANY): BOOLEAN
    			-- Does type of current object conform to type
    			-- of `other' (as per Eiffel: The Language, chapter 13)?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void

    	count: INTEGER_32
    			-- Length of text.
    			-- (from WEL_RICH_EDIT)

    	current_line_index: INTEGER_32
    			-- Index of the line that contains the caret.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0

    	wel_current_line_number: INTEGER_32
    			-- Line number of the line that contains the caret.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0
    			result_small_enough: Result < wel_line_count

    	current_selection_character_format: WEL_CHARACTER_FORMAT
    			-- Current selection character format information
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    		ensure -- from WEL_RICH_EDIT
    			result_not_void: Result /= Void

    	default_character_format: WEL_CHARACTER_FORMAT
    			-- Default character format information
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    		ensure -- from WEL_RICH_EDIT
    			result_not_void: Result /= Void

    	destroyed: BOOLEAN
    			-- Is `Current' destroyed ?
    			-- (from EV_WIDGET_IMP)

    	is_sensitive: BOOLEAN
    			-- Is the window enabled for mouse and keyboard input?
    			-- (from WEL_WINDOW)
    		require -- from  EV_SENSITIVE_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	enabled: BOOLEAN
    			-- Is the window enabled for mouse and keyboard input?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	event_mask: INTEGER_32
    			-- Event mask which specifies notification message the
    			-- control sends to its parent window.
    			-- See class WEL_ENM_CONSTANTS for values.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	ex_style: INTEGER_32
    			-- Window ex_style
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	exists: BOOLEAN
    			-- Does the `item' exist?
    			-- (from WEL_ANY)
    		require -- from  WEL_COLOR_CONTROL
    			True
    		ensure -- from WEL_ANY
    			Result = (wel_item /= default_pointer)

    	first_position_from_line_number (a_line: INTEGER_32): INTEGER_32
    			-- Position of the first character on the `i'-th line.
    		require -- from EV_TEXT_I
    			valid_line: valid_line_index (a_line)
    		ensure -- from EV_TEXT_I
    			valid_caret_position: valid_caret_position (a_line)

    	first_visible_line: INTEGER_32
    			-- Upper most visible line
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0
    			result_small_enough: Result < wel_line_count

    	focused_window: WEL_WINDOW
    			-- Current window which has the focus.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	foreground_window: WEL_WINDOW
    			-- Foreground window (window with focus)
    			-- (from WEL_WINDOWS_ROUTINES)

    	formatting_rect: WEL_RECT
    			-- Limiting rectangle the text. It is independent of
    			-- the size of the edit-control window.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    		ensure -- from WEL_EDIT
    			result_not_void: Result /= Void

    	get_next_target (a_widget: EV_WIDGET): EV_DOCKABLE_TARGET
    			-- `Result' is next dockable target that is is_dockable found by
    			-- recursively seraching up the parenting structure from `current_target'.
    			-- `Result' will be `Void' if none.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			a_widget_not_void: a_widget /= Void
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			result_is_dockable: Result /= Void implies Result.is_docking_enabled

    	wel_has_capture: BOOLEAN
    			-- Does this window have the capture?
    			-- (from WEL_WINDOW)
    		require -- from  EV_DOCKABLE_SOURCE_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	has_capture: BOOLEAN
    			-- Does `Current' have capture?
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	wel_has_capture: BOOLEAN
    			-- Does `Current' have capture?
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True

    	has_focus: BOOLEAN
    			-- Does this window have the focus?
    			-- (from WEL_WINDOW)
    		require -- from  EV_WIDGET_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	has_heavy_capture: BOOLEAN
    			-- Does this window have the heavy capture?
    			-- (from WEL_WINDOW)

    	has_horizontal_scroll_bar: BOOLEAN
    			-- Does this window have a horizontal scroll bar?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	has_selection: BOOLEAN
    			-- Has a current selection?
    			-- (from WEL_RICH_EDIT)
    		require -- from  EV_TEXT_COMPONENT_I
    			True
    		require -- from WEL_EDIT
    			exists: exists

    	has_system_font: BOOLEAN
    			-- Does the control use the system font?
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			exists: exists

    	has_vertical_scroll_bar: BOOLEAN
    			-- Does this window have a vertical scroll bar?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	heavy_capture_activated: BOOLEAN
    			-- Is the heavy capture currently running?
    			-- (i.e. is there a window in the current program
    			-- with has_heavy_capture to True?)
    			-- (from WEL_WINDOW)

    	wel_height: INTEGER_32
    			-- Window height
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	index_from_position (an_x_position, a_y_position: INTEGER_32): INTEGER_32
    			-- Index of character closest to position x_position, y_position.
    		require -- from EV_RICH_TEXT_I
    			position_valid: an_x_position >= 0 and an_x_position <= width and a_y_position >= 0 and a_y_position <= height
    		ensure -- from EV_RICH_TEXT_I
    			index_valid: Result >= 1 and Result <= text_length
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	initialize_for_loading
    			-- Initialize `Current' for load operations, by performing
    			-- optimizations that prevent the control from slowing down due to
    			-- unecessary optimizations.

    	initialize_for_saving
    			-- Initialize `Current' for save operations, by performing
    			-- optimizations that prevent the control from slowing down due to
    			-- unecessary optimizations.
    		require -- from  EV_RICH_TEXT_I
    			True
    		require -- from  EV_RICH_TEXT_BUFFERING_STRUCTURES_I
    			True

    	internal_character_format (pos: INTEGER_32): EV_CHARACTER_FORMAT_I
    			-- `Result' is character format at position `pos'. On some platforms
    			-- this may be optimized to take the selected character format and therefore
    			-- should only be used by next_change_of_character.
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: pos >= 1 and pos <= text_length + 1
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void

    	internal_character_format_contiguous (start_index, end_index: INTEGER_32): BOOLEAN
    			-- Is formatting from caret position `start_index' to `end_index' contiguous?
    			-- Internal version which permits optimizations as caret position and selection
    			-- does not need to be restored.
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: start_index >= 1 and end_index <= text_length + 1 and start_index <= end_index

    	internal_non_sensitive: BOOLEAN
    			-- Is `Current' not sensitive to input as seen
    			-- from interface?
    			-- (from EV_SENSITIVE_I)

    	internal_paragraph_format (caret_index: INTEGER_32): EV_PARAGRAPH_FORMAT
    			-- `Result' is paragraph_format at caret position `caret_index'.
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: caret_index >= 1 and caret_index <= text_length + 1
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void

    	internal_paragraph_format_contiguous (start_position, end_position: INTEGER_32): BOOLEAN
    			-- Is paragraph formatting from caret_position `start_position' to `end_position' contiguous?
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position

    	internal_selected_character_format: EV_CHARACTER_FORMAT
    			-- Implementation for selected_character_format. No preconditions permit
    			-- calling even when there is no selection as required by some implementation
    			-- features.
    		ensure
    			result_not_void: Result /= Void

    	internal_selected_character_format_i: EV_CHARACTER_FORMAT_IMP
    			-- Implementation for selected_character_format. No preconditions permit
    			-- calling even when there is no selection as required by some implementation
    			-- features.
    		ensure
    			result_not_void: Result /= Void

    	internal_selected_paragraph_format: EV_PARAGRAPH_FORMAT
    			-- Implementation for selected_paragraph_format. No preconditions permit
    			-- calling even when there is no selection as required by some implementation
    			-- features.
    		ensure
    			result_not_void: Result /= Void

    	is_editable: BOOLEAN
    			-- Is text editable?
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from  EV_TEXT_COMPONENT_I
    			True

    	is_inside: BOOLEAN
    			-- Is the current window inside another window?
    			-- (from WEL_WINDOW)

    	is_show_requested: BOOLEAN
    			-- Is `Current' displayed in its parent?
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from  EV_WIDGET_I
    			True

    	is_transport_enabled: BOOLEAN
    			-- Is the transport mechanism enabled?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	is_window (hwnd: POINTER): BOOLEAN
    			-- Does `hwnd' point to a valid Window?
    			-- (from WEL_WINDOWS_ROUTINES)

    	key_down (virtual_key: INTEGER_32): BOOLEAN
    			--Is 'virtual' key pressed
    			-- (from WEL_WINDOWS_ROUTINES)

    	key_locked (virtual_key: INTEGER_32): BOOLEAN
    			--Is 'virtual' key locked
    			-- (from WEL_WINDOWS_ROUTINES)

    	key_to_string (key_data: INTEGER_32): STRING_32
    			-- Give the string associated with the key given by
    			-- `virtual_key'.
    			-- (from WEL_WINDOWS_ROUTINES)

    	last_position_from_line_number (a_line: INTEGER_32): INTEGER_32
    			-- Position of the last character on the `i'-th line.
    		require -- from EV_TEXT_I
    			valid_line: valid_line_index (a_line)
    		ensure -- from EV_TEXT_I
    			valid_caret_position: valid_caret_position (a_line)

    	wel_line (i: INTEGER_32): STRING_32
    			-- `i'th line
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			i_large_enough: i >= 0
    			i_small_enough: i < wel_line_count
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			result_exists: Result /= Void

    	wel_line_count: INTEGER_32
    			-- Number of lines
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0

    	line_from_char (i: INTEGER_32): INTEGER_32
    			-- Index of the line that contains the character
    			-- index `i'. A character index is the number of
    			-- characters from the beginning of the edit control.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0

    	wel_line_index (i: INTEGER_32): INTEGER_32
    			-- Number of characters from the beginning of the edit
    			-- control to the zero-based line `i'.
    			-- Retrieve a character index for a given line number.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			i_large_enough: i >= 0
    			i_small_enough: i < wel_line_count
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0

    	line_index (i: INTEGER_32): INTEGER_32
    			-- Number of characters from the beginning of the edit
    			-- control to the zero-based line `i'.
    			-- Retrieve a character index for a given line number.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			i_large_enough: i >= 0
    			i_small_enough: i < wel_line_count
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0

    	line_length (i: INTEGER_32): INTEGER_32
    			-- Length of the `i'th line
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			i_large_enough: i >= 0
    			i_small_enough: i < wel_line_count
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0
    			result_ok: Result = wel_line (i).count

    	wel_line_number_from_position (a_pos: INTEGER_32): INTEGER_32
    			-- Retrieves the line number from a character position.
    			-- Line numbers start at 0.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			a_pos_large_enough: a_pos >= 0

    	line_number_from_position (i: INTEGER_32): INTEGER_32
    			-- Line containing caret position `i'.
    		require -- from EV_TEXT_I
    			valid_caret_position: valid_caret_position (i)
    		ensure -- from EV_TEXT_I
    			valid_line_number: Result >= 1 and Result <= line_count

    	managed: BOOLEAN is True
    			-- All widgets are managed.
    			-- (from EV_WIDGET_IMP)

    	maximal_height: INTEGER_32
    			-- Maximal height allowed for the window
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			result_large_enough: Result >= minimal_height

    	maximal_width: INTEGER_32
    			-- Maximal width allowed for the window
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			result_large_enough: Result >= minimal_width

    	maximized: BOOLEAN
    			-- Is the window maximized?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	minimal_height: INTEGER_32
    			-- Minimal height allowed for the window
    			-- Zero by default.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			positive_result: Result >= 0
    			result_small_enough: Result <= maximal_height

    	minimal_width: INTEGER_32
    			-- Minimal width allowed for the window
    			-- Zero by default.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			positive_result: Result >= 0
    			result_small_enough: Result <= maximal_width

    	minimized: BOOLEAN
    			-- Is the window minimized?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	mode_is_drag_and_drop: BOOLEAN
    			-- Is the transport mechanism drag and drop?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	mode_is_pick_and_drop: BOOLEAN
    			-- Is the transport mechanism pick and drop?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	mode_is_target_menu: BOOLEAN
    			-- Is the transport mechanism target menu?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	modified: BOOLEAN
    			-- Has the text been modified?
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	options: INTEGER_32
    			-- Give the current set of options.
    			-- (from WEL_RICH_EDIT)

    	paragraph_format (caret_index: INTEGER_32): EV_PARAGRAPH_FORMAT
    			-- `Result' is paragraph_format at caret position `caret_index'.
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: caret_index >= 1 and caret_index <= text_length + 1
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	paragraph_format_contiguous (start_position, end_position: INTEGER_32): BOOLEAN
    			-- Is paragraph formatting from caret_position `start_position' to `end_position' contiguous?
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	paragraph_format_range_information (start_position, end_position: INTEGER_32): EV_PARAGRAPH_FORMAT_RANGE_INFORMATION
    			-- Formatting range information from caret position `start_position' to `end_position'.
    			-- All attributes in `Result' are set to `True' if they remain consitent from `start_position' to
    			--`end_position' and `False' otherwise.
    			-- `Result' is a snapshot of `Current', and does not remain consistent as the contents
    			-- are subsequently changed.
    		require -- from EV_RICH_TEXT_I
    			valid_character_index: start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	placement: WEL_WINDOW_PLACEMENT
    			-- Window placement information
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			result_not_void: Result /= Void

    	position_from_character_index (character_index: INTEGER_32): WEL_POINT
    			-- Coordinates of a character at `character_index' in
    			-- the client area.
    			-- A returned coordinate can be negative if the
    			-- character has been scrolled outside the edit
    			-- control's client area.
    			-- The coordinates are truncated to integer values and
    			-- are in screen units relative to the upper-left
    			-- corner of the client area of the control.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			index_large_enough: character_index >= 0
    			index_small_enough: character_index <= wel_text_length + 2
    		ensure -- from WEL_RICH_EDIT
    			result_not_void: Result /= Void

    	position_from_index (an_index: INTEGER_32): EV_COORDINATE
    			-- Position of character at index `an_index'.
    		require -- from EV_RICH_TEXT_I
    			index_valid: an_index >= 1 and an_index <= text_length
    			character_displayed: character_displayed (an_index)
    		ensure -- from EV_RICH_TEXT_I
    			position_valid: Result.x >= 0 and Result.x <= width and Result.y >= 0 and Result.y <= height
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	read_only: BOOLEAN
    			-- Is the current edit control read-only?
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	same_type (other: ANY): BOOLEAN
    			-- Is type of current object identical to type of `other'?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			definition: Result = (conforms_to (other) and other.conforms_to (Current))

    	scroll_caret_at_selection: BOOLEAN
    			-- Will the caret be scrolled at the selection after
    			-- a call to set_selection?
    			-- (from WEL_MULTIPLE_LINE_EDIT)

    	selected_character_format: EV_CHARACTER_FORMAT
    			-- `Result' is character format of current selection.
    			-- If more than one format is contained in the selection, `Result'
    			-- is the first of these formats.
    		require -- from EV_RICH_TEXT_I
    			has_selection: has_selection
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	selected_paragraph_format: EV_PARAGRAPH_FORMAT
    			-- `Result' is paragraph format of current selection.
    			-- If more than one format is contained in the selection, `Result'
    			-- is the first of these formats.
    		require -- from EV_RICH_TEXT_I
    			has_selection: has_selection
    		ensure -- from EV_RICH_TEXT_I
    			result_not_void: Result /= Void
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	selection: WEL_CHARACTER_RANGE
    			-- Structure which contains the starting and ending
    			-- character positions of the selection.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	selection_end: INTEGER_32
    			-- Index of last character selected.
    		require -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    		ensure -- from EV_TEXT_COMPONENT_I
    			result_large_enough: Result >= 1
    			result_small_enough: Result <= text_length

    	wel_selection_end: INTEGER_32
    			-- Index of the last character selected
    			-- (from WEL_RICH_EDIT)
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from WEL_EDIT
    			result_large_enough: Result >= 0
    			result_small_enough: Result <= wel_text_length + 2

    	wel_selection_start: INTEGER_32
    			-- Index of the first character selected
    			-- (from WEL_RICH_EDIT)
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from WEL_EDIT
    			result_large_enough: Result >= 0
    			result_small_enough: Result <= wel_text_length

    	selection_start: INTEGER_32
    			-- Index of first character selected.
    		require -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    		ensure -- from EV_TEXT_COMPONENT_I
    			result_large_enough: Result >= 1
    			result_small_enough: Result <= text_length

    	set_caret_position (pos: INTEGER_32)
    			-- set current caret position.
    		require -- from EV_TEXT_COMPONENT_I
    			valid_caret_position: valid_caret_position (pos)

    	shared: BOOLEAN
    			-- Is `item' shared by another object?
    			-- If False (by default), `item' will
    			-- be destroyed by destroy_item.
    			-- If True, `item' will not be destroyed.
    			-- (from WEL_ANY)

    	shown: BOOLEAN
    			-- Is the window shown?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	is_displayed: BOOLEAN
    			-- Is the window shown?
    			-- (from WEL_WINDOW)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from  EV_WIDGET_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	style: INTEGER_32
    			-- Window style
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	system_directory: STRING_32
    			-- Path of the Windows system directory
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			result_not_void: Result /= Void

    	tab_positions: EV_ACTIVE_LIST [INTEGER_32]
    			-- Width of each tab position in pixels, from left to right.
    			-- All tab positions not included use tab_width.
    			-- (from EV_RICH_TEXT_I)

    	tab_width: INTEGER_32
    			-- Default width in pixels of each tab in `Current'.

    	text: STRING_32
    			-- text of `Current'.
    		require -- from  EV_TEXTABLE_I
    			True
    		ensure -- from EV_TEXTABLE_I
    			not_void: Result /= Void
    			cloned: Result /= text

    	wel_text: STRING_32
    			-- Contents of the rich edit control
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			result_not_void: Result /= Void

    	text_at (i: INTEGER_32; n: INTEGER_32): STRING_32
    			-- Text of length `n' at position `i'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			valid_length: n > 0
    			valid_index: wel_text.valid_index (i + 1)
    			valid_length: wel_text.valid_index (i + n)

    	text_length: INTEGER_32
    			-- Number of characters comprising text. This is an optimized
    			-- version, which only recomputes the length if not text_up_to_date.
    			-- Was declared in EV_RICH_TEXT_IMP as synonym of wel_text_length.
    		ensure -- from EV_TEXT_COMPONENT_I
    			result_not_negative: Result >= 0

    	tick_count: INTEGER_32
    			-- Number of milliseconds that have
    			-- elapsed since Windows was started.
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			positive_result: Result >= 0

    	user_is_sensitive: BOOLEAN
    			-- Is the object sensitive to user input.
    			-- (from EV_SENSITIVE_I)

    	valid_caret_position (pos: INTEGER_32): BOOLEAN
    			-- Is `pos' a valid position for the caret?
    			-- (from EV_TEXT_COMPONENT_I)

    	valid_color_constant (c: INTEGER_32): BOOLEAN
    			-- Is `c' a valid color constant?
    			-- (from WEL_COLOR_CONSTANTS)

    	wel_text_length: INTEGER_32
    			-- Number of characters comprising text. This is an optimized
    			-- version, which only recomputes the length if not text_up_to_date.
    			-- Was declared in EV_RICH_TEXT_IMP as synonym of text_length.
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			positive_result: Result >= 0

    	wel_width: INTEGER_32
    			-- Window width
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	window_captured: BOOLEAN
    			-- Has a window been captured?
    			-- (from WEL_WINDOW)

    	window_of_item (hwnd: POINTER): WEL_WINDOW
    			-- Retrieve Eiffel object associated with `hwnd' pointer.
    			-- (from WEL_WINDOWS_ROUTINES)
    		require -- from WEL_WINDOWS_ROUTINES
    			hwnd_not_null: hwnd /= default_pointer
    			is_window_pointer: is_window (hwnd)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			is_wel_window: Result /= Void implies (create {INTERNAL}).type_conforms_to ((create {INTERNAL}).dynamic_type (Result), (create {INTERNAL}).dynamic_type_from_string ("WEL_WINDOW"))

    	window_rect: WEL_RECT
    			-- Window rectangle (absolute position)
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			result_not_void: Result /= Void

    	windows_directory: STRING_32
    			-- Path of the Windows directory
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			result_not_void: Result /= Void

    	x: INTEGER_32
    			-- Window x position
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			wel_parent = Void implies Result = absolute_x

    	y: INTEGER_32
    			-- Window y position
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			wel_parent = Void implies Result = absolute_y

    feature {ANY} -- Status report

    	valid_hwnd_constant (c: POINTER): BOOLEAN
    			-- Is `c' a valid hwnd constant?
    			-- (from WEL_HWND_CONSTANTS)

    feature -- Status setting

    	buffered_append (a_text: STRING_GENERAL; format: EV_CHARACTER_FORMAT)
    			-- Append `a_text' with format `format' to append buffer.
    			-- To render buffer to `Current', call flush_buffer which replaces current content,
    			-- or flush_buffer_to which inserts the formatted text.
    			-- `format' is not cloned internally and when buffer is flushed, its reference is
    			-- used. Therefore, you must not modify `format' externally after passing to
    			-- this procedure, otherwise all buffered appends that referenced the same `format' object
    			-- will use its current value.
    		require -- from EV_RICH_TEXT_I
    			a_text_not_void: a_text /= Void
    			format_not_void: format /= Void
    			buffer_not_locked_for_format: not buffer_locked_in_format_mode
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			buffer_locked_for_append: buffer_locked_in_append_mode
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	buffered_format (start_pos, end_pos: INTEGER_32; format: EV_CHARACTER_FORMAT)
    			-- Apply a character format `format' from caret positions `start_position' to `end_position' to
    			-- format buffer. Call flush_buffer to apply buffered contents to `Current'.
    			-- `format' is not cloned internally and when buffer is flushed, its reference is
    			-- used. Therefore, you must not modify `format' externally after passing to
    			-- this procedure, otherwise all buffered appends that referenced the same `format' object
    			-- will use its current value.
    		require -- from EV_RICH_TEXT_I
    			valid_positions: start_pos <= end_pos and start_pos >= 1 and end_pos <= text_length + 1
    			format_not_void: format /= Void
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			buffer_locked_for_format: buffer_locked_in_format_mode
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	check_drag_and_drop_release (a_x, a_y: INTEGER_32)
    			-- End transport if in drag and drop.
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	check_dragable_release (a_x, a_y: INTEGER_32)
    			-- End transport if in drag and drop.
    			-- (from EV_DOCKABLE_SOURCE_IMP)

    	disable_capture
    			-- Release all user events.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_I
    			True
    		require -- from  EV_DOCKABLE_SOURCE_IMP
    			True

    	disable_commands
    			-- Disable commands execution.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			commands_disabled: not commands_enabled

    	disable_default_processing
    			-- Disable default window processing.
    			-- The standard window procedure will not be called for
    			-- each messages received by the window and then the
    			-- normal behavior will not occur.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			default_processing_disabled: not default_processing

    	disable_dockable
    			-- Ensure `Current' is not dockable
    			-- (from EV_DOCKABLE_SOURCE_I)
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			not_is_dockable: not is_dockable

    	disable_drag_accept_files
    			-- Disallow `Current' from being a file drag and drop target.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists

    	disable_external_docking
    			-- Forbid `Current' to be docked into an EV_DOCKABLE_DIALOG
    			-- When there is no valid EV_DRAGABLE_TARGET upon completion
    			-- of the transport?
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			is_dockable: is_dockable
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			not_externally_dockable: not is_external_docking_enabled

    	disable_external_docking_relative
    			-- Assign `False' to is_external_docking_relative, ensuring that
    			-- a dockable dialog displayed when `Current' is docked externally
    			-- is displayed as a standard window.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			external_docking_enabled: is_external_docking_enabled
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			external_docking_not_relative: not is_external_docking_relative

    	disable_notifications
    			-- Disable all notifications.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    		ensure -- from WEL_RICH_EDIT
    			no_notification: event_mask = enm_none

    	disable_pebble_positioning
    			-- Assign `False' to pebble_positioning_enabled.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	disable_scroll_caret_at_selection
    			-- Set scroll_caret_at_selection to False.
    			-- The caret will not be scrolled at the selection
    			-- after a call to set_selection.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			scroll_caret_at_selection_disabled: not scroll_caret_at_selection

    	disable_sensitive
    			-- Set `Current' to insensitive mode.
    			-- This means that any events with an
    			-- event type of KeyPress, KeyRelease,
    			-- ButtonPress, ButtonRelease, MotionNotify,
    			-- EnterNotify, LeaveNotify, FocusIn or
    			-- FocusOut will not be dispatched to current
    			-- widget and to all its children.  Set it to
    			-- sensitive mode otherwise.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SENSITIVE_I
    			True

    	disable_transport
    			-- Deactivate pick/drag and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_I
    			True
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			is_transport_disabled: not is_transport_enabled

    	disable_word_wrapping
    			-- Ensure `has_word_wrap' is False.
    		require -- from  EV_TEXT_I
    			True
    		ensure -- from EV_TEXT_I
    			word_wrapping_disabled: not has_word_wrapping

    	dragable_motion (a_x, a_y, a_screen_x, a_screen_y: INTEGER_32)
    			-- If in drag/pick and drop then update.
    			-- (from EV_DOCKABLE_SOURCE_IMP)

    	dragable_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
    			-- Process `a_button' to start/stop the drag/pick and
    			-- drop mechanism.
    			-- (from EV_DOCKABLE_SOURCE_IMP)

    	enable_all_notifications
    			-- Enable all notifications.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	enable_capture
    			-- Enable capture.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_I
    			True

    	enable_commands
    			-- Enable commands execution.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			commands_enabled: commands_enabled

    	enable_default_processing
    			-- Enable default window processing.
    			-- The standard window procedure will be called for
    			-- each messages received by the window and then the
    			-- normal behavior will occur.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			default_processing_enabled: default_processing

    	enable_dockable
    			-- Allow `Current' to be dockable
    			-- (from EV_DOCKABLE_SOURCE_I)
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			is_dockable: is_dockable

    	enable_drag_accept_files
    			-- Allow `Current' to be a file drag and drop target.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists

    	enable_external_docking
    			-- Allow `Current' to be docked into an EV_DOCKABLE_DIALOG
    			-- When there is no valid EV_DRAGABLE_TARGET upon completion
    			-- of the transport?
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			is_dockable: is_dockable
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			is_externally_dockable: is_external_docking_enabled

    	enable_external_docking_relative
    			-- Assign `True' to is_external_docking_relative, ensuring that
    			-- a dockable dialog displayed when `Current' is docked externally
    			-- is displayed relative to the top level window.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			external_docking_enabled: is_external_docking_enabled
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			external_docking_not_relative: is_external_docking_relative

    	enable_pebble_positioning
    			-- Assign `True' to pebble_positioning_enabled.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	enable_scroll_caret_at_selection
    			-- Set scroll_caret_at_selection to True.
    			-- The caret will be scrolled at the selection after
    			-- a call to set_selection.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			scroll_caret_at_selection_enabled: scroll_caret_at_selection

    	enable_sensitive
    			-- Set `Current' to sensitive mode.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SENSITIVE_I
    			True

    	enable_standard_notifications
    			-- Enable the standard notifications.
    			-- (Enm_change, Enm_update and Enm_scroll).
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	enable_transport
    			-- Activate pick/drag and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_IMP)
    		require -- from EV_PICK_AND_DROPABLE_I
    			pebble_not_void: pebble /= Void or pebble_function /= Void
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			is_transport_enabled: interface.implementation.is_transport_enabled

    	enable_word_wrapping
    			-- Ensure `has_word_wrap' is True.
    		require -- from  EV_TEXT_I
    			True
    		ensure -- from EV_TEXT_I
    			word_wrapping_enabled: has_word_wrapping

    	escape_pnd
    			-- Escape the pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_IMP)
    		ensure -- from EV_PICK_AND_DROPABLE_IMP
    			not_in_transport: not transport_executing

    	flush_buffer
    			-- Flush any buffered operations.
    		ensure -- from EV_RICH_TEXT_I
    			buffer_not_locked: not buffer_locked_in_append_mode and not buffer_locked_in_format_mode
    			caret_consistent: (old buffer_locked_in_append_mode implies caret_position = 1) or old buffer_locked_in_format_mode implies (caret_position = old caret_position)
    			unselected: not has_selection

    	flush_buffer_to (start_position, end_position: INTEGER_32)
    			-- Replace contents of current from caret position `start_position' to `end_position' with
    			-- contents of buffer, since it was last flushed. If `start_position' and `end_position'
    			-- are equal, insert the contents of the buffer at caret position `start_position'.
    		require -- from EV_RICH_TEXT_I
    			buffer_locked_for_append: buffer_locked_in_append_mode
    			start_position >= 1 and end_position <= text_length + 1 and start_position <= end_position
    		ensure -- from EV_RICH_TEXT_I
    			buffer_locked_for_append: not buffer_locked_in_append_mode
    			caret_consistent: old caret_position <= text_length + 1 implies caret_position = old caret_position
    			unselected: not has_selection

    	format_paragraph (start_position, end_position: INTEGER_32; format: EV_PARAGRAPH_FORMAT)
    			-- Apply paragraph formatting `format' to caret positions `start_position', `end_position' inclusive.
    			-- Formatting applies to complete lines as seperated by new line characters that `start_position' and
    			-- `end_position' fall on.
    		require -- from EV_RICH_TEXT_I
    			valid_positions: start_position <= end_position and start_position >= 1 and end_position <= text_length + 1
    			format_not_void: format /= Void
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	format_region (first_pos, last_pos: INTEGER_32; format: EV_CHARACTER_FORMAT)
    			-- Apply `format' to all characters between the caret positions `start_position' and `end_position'.
    			-- Formatting is applied immediately.
    		require -- from EV_RICH_TEXT_I
    			valid_positions: first_pos < last_pos and first_pos >= 1 and last_pos <= text_length + 1
    			format_not_void: format /= Void
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	get_text_limit: INTEGER_32
    			-- Get the maximum length of text that the user
    			-- can enter into the edit control.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exisits: exists
    		ensure -- from WEL_EDIT
    			positive_result: Result >= 0

    	has_parent: BOOLEAN
    			-- Is `Current' parented?
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SENSITIVE_I
    			True

    	hide
    			-- Hide `Current'.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			hidden: not is_displayed

    	insert_rtf_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
    			-- Start a rtf stream in operation with `stream'.
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	internal_actions_blocked: BOOLEAN
    			-- Are caret position and selection change actions blocked internally due to an operation
    			-- occurring that may affect them. They must be displayed during the implementation of
    			-- certain features that require such modification as part of their implementation. See
    			-- safe_store_caret, safe_restore_caret.

    	internal_change_word_wrapping (word_wrapping: BOOLEAN)
    			-- Enable word wrapping if `word_wrapping', otherwise disable.
    		ensure
    			option_set: has_word_wrapping = word_wrapping

    	maximize
    			-- Maximize the window
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			maximized: maximized

    	minimize
    			-- Minimize the window and display its icon
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			minimized: minimized

    	modify_paragraph (start_position, end_position: INTEGER_32; format: EV_PARAGRAPH_FORMAT; applicable_attributes: EV_PARAGRAPH_FORMAT_RANGE_INFORMATION)
    			-- Modify paragraph formatting `format' from caret positions `start_position' to `end_position' inclusive.
    			-- Formatting applies to complete lines as seperated by new line characters that `start_position' and
    			-- `end_position' fall on. All attributes of `format' that are set to `True' within `applicable_attributes' are applied.
    		require -- from EV_RICH_TEXT_I
    			applicable_attributes_not_void: applicable_attributes /= Void
    			valid_positions: start_position <= end_position and start_position >= 1 and end_position <= text_length + 1
    			format_not_void: format /= Void
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	modify_region (start_position, end_position: INTEGER_32; format: EV_CHARACTER_FORMAT; applicable_attributes: EV_CHARACTER_FORMAT_RANGE_INFORMATION)
    			-- Modify formatting from `start_position' to `end_position' applying all attributes of `format' that are set to
    			-- `True' within `applicable_attributes', ignoring others.
    		require -- from EV_RICH_TEXT_I
    			applicable_attributes_not_void: applicable_attributes /= Void
    			valid_positions: start_position < end_position and start_position >= 1 and end_position <= text_length + 1
    			format_not_void: format /= Void
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	move_to_selection
    			-- Move the selected text to be visible
    			-- (from WEL_RICH_EDIT)

    	must_restore_selection: BOOLEAN
    			-- Must a selection be restored by safe_restore_caret?
    			-- It is not just enough to check that there was originally a selection. For example, in the case
    			-- where the `En_selchange_message' is received during an operation that will then call safe_restore_caret.
    			-- As the selection may have changed from none to something between safe_store_caret and safe_restore_caret,
    			-- it is flagged, so the selection can be set. To reproduce such dangerous behaviour, remove selection from the rich text,
    			-- connect an event to the selection_change_actions that queries the character format (internally this manipulates the selection)
    			-- and select using shift and left or right. Without this boolean being set from on_en_selchange the new selection would not
    			-- be correctly shown in the control. Julian.

    	original_caret_position: INTEGER_32
    			-- Original position of caret before call `to safe_store_caret, to be restored by safe_restore_caret.

    	original_selection_end: INTEGER_32
    			-- Original selection when safe_store_caret called.

    	original_selection_start: INTEGER_32
    			-- Original selection when safe_store_caret called.

    	parent_is_sensitive: BOOLEAN
    			-- Is parent of `Current' sensitive?
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_SENSITIVE_I
    			True

    	pnd_motion (a_x, a_y, a_screen_x, a_screen_y: INTEGER_32)
    			-- If in drag/pick and drop then update.
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	pnd_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
    			-- Process `a_button' to start/stop the drag/pick and
    			-- drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	release_capture
    			-- Release the mouse capture after a call
    			-- to set_capture.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			has_capture: wel_has_capture
    		ensure -- from WEL_WINDOW
    			not_has_capture: not wel_has_capture

    	release_heavy_capture
    			-- Release the mouse capture after a call
    			-- to set_heavy_capture.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			has_heavy_capture: has_heavy_capture
    			heavy_capture_activated: heavy_capture_activated
    		ensure -- from WEL_WINDOW
    			heavy_capture_set: not has_heavy_capture
    			heavy_capture_deactivated: not heavy_capture_activated

    	remove_default_key_processing_handler
    			-- Ensure default_key_processing_handler is Void.
    			-- (from EV_WIDGET_I)
    		ensure -- from EV_WIDGET_I
    			default_key_processing_handler_removed: default_key_processing_handler = Void

    	remove_pebble
    			-- Remove pebble.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pebble_removed: pebble = Void and pebble_function = Void
    			is_transport_disabled: not is_transport_enabled

    	remove_real_source
    			-- Ensure real_source is `Void'.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			is_dockable: is_dockable
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			real_source_void: real_source = Void

    	remove_real_target
    			-- Ensure real_target is `Void'.
    			-- (from EV_WIDGET_I)
    		ensure -- from EV_WIDGET_I
    			real_target_void: real_target = Void

    	restore
    			-- Restore the window to its
    			-- original size and position after
    			-- minimize or maximize
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	rtf_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
    			-- Start a rtf stream in operation with `stream'.
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	safe_restore_caret
    			-- Restore caret position stored by last call to safe_store_caret and restore
    			-- change events.

    	safe_store_caret
    			-- Store caret position, and block caret change events from occuring.

    	scroll_to_end
    			-- Scroll to end.
    		require -- from  EV_TEXT_I
    			True

    	select_region (start_pos, end_pos: INTEGER_32)
    			-- Select (hilight) text between
    			-- 'start_pos' and 'end_pos'
    		require -- from EV_TEXT_COMPONENT_I
    			valid_start: start_pos >= 1 and start_pos <= text_length
    			valid_end: end_pos >= 1 and end_pos <= text_length
    		ensure -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    			selection_set: (start_pos <= end_pos implies selection_start = start_pos and selection_end = end_pos) or selection_start = end_pos and selection_end = start_pos

    	set_accept_cursor (a_cursor: like accept_cursor)
    			-- Set `a_cursor' to be displayed when the screen pointer is over a
    			-- target that accepts pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	set_actual_drop_target_agent (an_agent: like actual_drop_target_agent)
    			-- Assign `an_agent' to actual_drop_target_agent.
    			-- (from EV_WIDGET_I)
    		require -- from EV_WIDGET_I
    			an_agent_not_void: an_agent /= Void
    		ensure -- from EV_WIDGET_I
    			assigned: actual_drop_target_agent = an_agent

    	wel_set_background_color (color: WEL_COLOR_REF)
    			-- Set the background color with `color'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			color_not_void: color /= Void

    	set_background_color (color: EV_COLOR)
    			-- Make `color' the new background_color
    		require -- from EV_COLORIZABLE_I
    			a_color_not_void: color /= Void
    		ensure -- from EV_COLORIZABLE_I
    			background_color_assigned: is_initialized implies interface.implementation.background_color.is_equal (color)

    	set_background_system_color
    			-- Set the background color with the window
    			-- background system color.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	set_capture
    			-- Set the mouse capture to the `Current' window.
    			-- Once the window has captured the mouse, all
    			-- mouse input is directed to this window, regardless
    			-- of whether the cursor is over that window. Only
    			-- one window can have the mouse capture at a time.
    			--
    			-- Works only for windows in the same thread as your
    			-- application.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			has_not_capture: not wel_has_capture
    			has_not_heavy_capture: not has_heavy_capture
    		ensure -- from WEL_WINDOW
    			has_capture: wel_has_capture

    	internal_set_caret_position (position: INTEGER_32)
    			-- Set the caret position with `position'.
    			-- If scroll_caret_at_selection is True, the
    			-- caret will be scrolled to `position'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position <= wel_text_length
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True
    		ensure -- from WEL_EDIT
    			has_no_selection: not has_selection
    			caret_position_set: internal_caret_position = position

    	set_current_format (format: EV_CHARACTER_FORMAT)
    			-- apply `format' to current caret position, applicable
    			-- to next typed characters.
    		require -- from EV_RICH_TEXT_I
    			format_not_void: format /= Void
    		ensure -- from EV_RICH_TEXT_I
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	set_default_font
    			-- Make system to use default font.
    			-- (from EV_FONTABLE_IMP)

    	set_default_key_processing_handler (a_handler: like default_key_processing_handler)
    			-- Assign default_key_processing_handler to `a_handler'.
    			-- (from EV_WIDGET_I)

    	set_default_tab_stops
    			-- Set default tab stops.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists

    	set_deny_cursor (a_cursor: like deny_cursor)
    			-- Set `a_cursor' to be displayed when the screen pointer is over a
    			-- target that doesn't accept pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	set_drag_and_drop_mode
    			-- Set transport mechanism to drag and drop,
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			mode_is_drag_and_drop: mode_is_drag_and_drop

    	set_editable (flag: BOOLEAN)
    			-- If `flag' then make `Current' editable else
    			-- make `Current' component read-only.
    			-- (from EV_TEXT_COMPONENT_IMP)

    	set_event_mask (an_event_mask: INTEGER_32)
    			-- Set event_mask with `an_event_mask'.
    			-- See class WEL_ENM_CONSTANTS for values.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    		ensure -- from WEL_RICH_EDIT
    			event_mask_set: event_mask = an_event_mask

    	set_ex_style (an_ex_style: INTEGER_32)
    			-- Set `an_ex_style' with ex_style.
    			--
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	set_focus
    			-- Set the focus to `Current'
    			-- (from WEL_WINDOW)
    		require -- from  EV_WIDGET_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	set_font (ft: EV_FONT)
    			-- Make `ft' new font of `Current'.
    			-- (from EV_FONTABLE_IMP)
    		require -- from EV_FONTABLE_I
    			a_font_not_void: ft /= Void
    		ensure -- from EV_FONTABLE_I
    			assigned: is_usable implies font.is_equal (ft)

    	set_formatting_rect (rect: WEL_RECT)
    			-- Set formatting_rect with `rect'.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			rect_not_void: rect /= Void

    	set_heavy_capture
    			-- Set the mouse capture to the `Current' window.
    			-- Once the window has captured the mouse, all
    			-- mouse input is directed to this window, regardless
    			-- of whether the cursor is over that window. Only
    			-- one window can have the mouse capture at a time.
    			--
    			-- Works for ALL windows.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			has_not_heavy_capture: not has_heavy_capture
    			heavy_capture_deactivated: not heavy_capture_activated
    		ensure -- from WEL_WINDOW
    			heavy_capture_set: has_heavy_capture implies heavy_capture_activated

    	set_modify (modify: BOOLEAN)
    			-- Set modified with `modify'
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    		ensure -- from WEL_EDIT
    			modified_set: modified = modify

    	set_options (operation, an_options: INTEGER_32)
    			-- Set the opetions for the control.
    			-- See class WEL_ECO_CONSTANTS for values.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	set_pebble (a_pebble: like pebble)
    			-- Assign `a_pebble' to pebble.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		require -- from EV_PICK_AND_DROPABLE_I
    			a_pebble_not_void: a_pebble /= Void
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pebble_assigned: interface.implementation.pebble = a_pebble
    			is_transport_enabled: interface.implementation.is_transport_enabled

    	set_pebble_function (a_function: FUNCTION [ANY, TUPLE, ANY])
    			-- Assign `a_function' to pebble_function.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		require -- from EV_PICK_AND_DROPABLE_I
    			a_function_not_void: a_function /= Void
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pebble_function_assigned: interface.implementation.pebble_function = a_function
    			is_transport_enabled: interface.implementation.is_transport_enabled

    	set_pebble_position (a_x, a_y: INTEGER_32)
    			-- Set the initial position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pick_x_assigned: pick_x = a_x
    			pick_y_assigned: pick_y = a_y

    	set_pick_and_drop_mode
    			-- Set transport mechanism to pick and drop,
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			mode_is_pick_and_drop: mode_is_pick_and_drop

    	set_read_only
    			-- Set the read-only state.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	set_read_write
    			-- Set the read-write state.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	set_real_source (dockable_source: EV_DOCKABLE_SOURCE)
    			-- Set `dockable_source' to be the widget moved when a
    			-- drag begins on `Current'.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			is_dockable: is_dockable
    			dockable_source_not_void: dockable_source /= Void
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			real_source_assigned: real_source = dockable_source

    	set_real_target (a_target: EV_DOCKABLE_TARGET)
    			-- Assign `a_target' to real_target.
    			-- (from EV_WIDGET_I)
    		require -- from EV_WIDGET_I
    			target_not_void: a_target /= Void
    		ensure -- from EV_WIDGET_I
    			assigned: real_target = a_target

    	set_selection (start_position, end_position: INTEGER_32)
    			-- Set the selection between `start_position'
    			-- and `end_position'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			selection_in_lower_bound: start_position >= 0 and end_position >= 0
    			selection_in_upper_bound: start_position <= wel_text_length and end_position <= wel_text_length
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True
    		require else -- from WEL_RICH_EDIT
    			selection_in_upper_bound: start_position <= wel_text_length and end_position <= wel_text_length + 1
    		ensure -- from WEL_EDIT
    			has_selection: (start_position /= end_position) implies has_selection

    	set_shared
    			-- Set shared to True.
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			shared: shared

    	set_style (a_style: INTEGER_32)
    			-- Set style with `a_style'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	set_tab_stops (tab: INTEGER_32)
    			-- Set tab stops at every `tab' dialog box units.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			positive_tab: tab > 0

    	set_tab_stops_array (tab: ARRAY [INTEGER_32])
    			-- Set tab stops using the values of `tab'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    			tab_not_void: tab /= Void
    			tab_large_enough: tab.count > 1

    	set_tab_width (a_width: INTEGER_32)
    			-- Assign `a_width' in pixels to tab_width.
    		require -- from EV_RICH_TEXT_I
    			width_positive: a_width > 0
    		ensure -- from EV_RICH_TEXT_I
    			tab_width_set: tab_width = a_width
    			text_not_changed: text.is_equal (old text)
    			caret_not_moved: caret_position = old caret_position
    			selection_not_changed: old has_selection = has_selection and has_selection implies old selection_start = selection_start and old selection_end = selection_end

    	set_target_menu_mode
    			-- Set transport mechanism to target_menu.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			mode_is_target_menu: mode_is_target_menu

    	wel_set_text (a_text: STRING_GENERAL)
    			-- Set text with `a_text'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			text_set_when_not_void: a_text /= Void implies wel_text.is_equal (a_text)
    			text_set_when_void: a_text = Void implies wel_text.count = 0

    	set_text (a_text: STRING_GENERAL)
    			-- Set text with `a_text'.
    		require -- from EV_TEXTABLE_I
    			a_text_not_void: a_text /= Void
    			no_carriage_returns: not a_text.has_code (('%R').natural_32_code)
    		ensure -- from EV_TEXTABLE_I
    			text_cloned: text.is_equal (a_text) and then text /= a_text

    	set_text_limit (limit: INTEGER_32)
    			-- Set to `limit' the length of the text the user
    			-- can enter into the edit control.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			positive_limit: limit >= 0
    		require -- from  EV_TEXT_COMPONENT_IMP
    			True

    	set_unshared
    			-- Set shared to False.
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			unshared: not shared

    	show
    			-- Show `Current'.
    			-- Need to notify the parent.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	text_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
    			-- Start a text stream in operation with `stream'.
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	update_cached_style (new_ex_style, old_ex_style: INTEGER_32)
    			-- Update Window cache buffer for Window style.
    			-- (from WEL_WINDOW)

    	update_tab_positions (value: INTEGER_32)
    			-- Update tab widths based on contents of tab_positions.
    			-- `value' is the index of the changed value when called directly by tab_positions, as
    			-- the result of a list modification, and is not used.
    			-- Therefore, when calling update_tab_positions explicitly, any value may be passed.

    	user_disable_sensitive
    			-- Make object desensitive to user input.
    			-- (from EV_SENSITIVE_I)
    		ensure -- from EV_SENSITIVE_I
    			is_desensitive: not user_is_sensitive

    	user_enable_sensitive
    			-- Make object sensitive to user input.
    			-- (from EV_SENSITIVE_I)
    		ensure -- from EV_SENSITIVE_I
    			is_sensitive_if_parent_sensitive: (has_parent and then parent_is_sensitive) implies interface.implementation.is_sensitive
    			is_sensitive_if_orphaned: not has_parent implies interface.implementation.is_sensitive

    feature -- Element change

    	disable_redraw
    			-- Disable redrawing of `Current' until next call to enable_redraw.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	has_system_window_locked: BOOLEAN
    			-- Is there any window locked ?
    			-- (from WEL_WINDOW)

    	ignore_filtered_message
    			-- Call this message from within on_en_msgfilter
    			-- to prevent the filtered message to be handled
    			-- by the Rich Edit Control.
    			-- (from WEL_RICH_EDIT)

    	lock_window_update
    			-- Disables drawing in the current window. A locked window cannot be moved.
    			-- Only one window can be locked at a time. To unlock a window locked with
    			-- lock_window_update , call 'unlock_window_update'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			has_system_window_locked

    	print_all (dc: WEL_PRINTER_DC; title: STRING_GENERAL)
    			-- Print the contents of the rich edit control on
    			-- the printer `dc'. `title' is the printer job name.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			dc_not_void: dc /= Void
    			dc_exists: dc.exists
    			title_not_void: title /= Void

    	remove_help_context
    			-- Remove key press action associated with `EV_APPLICATION.help_key'.
    			-- (from EV_HELP_CONTEXTABLE_I)
    		require -- from EV_HELP_CONTEXTABLE_I
    			help_context_not_void: help_context /= Void
    		ensure -- from EV_HELP_CONTEXTABLE_I
    			no_help_context: internal_help_context = Void

    	set_character_format_all (a_char_format: WEL_CHARACTER_FORMAT)
    			-- Apply `a_char_format' to all text.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			a_char_format_not_void: a_char_format /= Void

    	set_character_format_selection (a_char_format: WEL_CHARACTER_FORMAT)
    			-- Apply `a_char_format' to current selection.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			a_char_format_not_void: a_char_format /= Void

    	set_character_format_word (a_char_format: WEL_CHARACTER_FORMAT)
    			-- Set the current word with `a_char_format'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			a_char_format_not_void: a_char_format /= Void

    	set_default_colors
    			-- Set foreground and background color to their default values.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_COLORIZABLE_I
    			True

    	wel_set_font (a_font: WEL_FONT)
    			-- Set font with `a_font'.
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			exists: exists
    			a_font_not_void: a_font /= Void
    			a_font_exists: a_font.exists
    		ensure -- from WEL_CONTROL
    			font_set: not has_system_font implies wel_font.item = a_font.item

    	set_foreground_color (color: EV_COLOR)
    			-- Make `color' the new foreground_color
    			-- (from EV_WIDGET_IMP)
    		require -- from EV_COLORIZABLE_I
    			a_color_not_void: color /= Void
    		ensure -- from EV_COLORIZABLE_I
    			foreground_color_assigned: is_initialized implies interface.implementation.foreground_color.is_equal (color)

    	set_help_context (an_help_context: like help_context)
    			-- Assign `a_help_context' to help_context.
    			-- Assign `an_help_context' to help_context.
    			-- (from EV_HELP_CONTEXTABLE_I)
    		require -- from EV_HELP_CONTEXTABLE_I
    			an_help_context_not_void: an_help_context /= Void
    		ensure -- from EV_HELP_CONTEXTABLE_I
    			help_context_assigned: help_context.is_equal (an_help_context)

    	set_item (an_item: POINTER)
    			-- Set `item' with `an_item'
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			item_set: wel_item = an_item

    	set_paragraph_format (a_para_format: WEL_PARAGRAPH_FORMAT)
    			-- Set the current paragraph with `a_para_format'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			a_para_format_not_void: a_para_format /= Void

    	set_parent (par: EV_CONTAINER)
    			-- Make `par' the new parent of the widget.
    			-- `par' can be Void then the parent is the
    			-- default_parent.
    			-- (from EV_PRIMITIVE_IMP)

    	wel_set_parent (a_parent: WEL_WINDOW)
    			-- Change the parent of the current window.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	set_placement (a_placement: WEL_WINDOW_PLACEMENT)
    			-- Set placement with `a_placement'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			a_placement_not_void: a_placement /= Void

    	set_timer (timer_id, time_out: INTEGER_32)
    			-- Set a timer identified by `timer_id' with a
    			-- `time_out' value (in milliseconds).
    			-- See also on_timer, kill_timer.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			positive_timer_id: timer_id > 0
    			positive_time_out: time_out > 0

    	set_tooltip (a_tooltip: STRING_GENERAL)
    			-- Assign `a_tooltip' to tooltip.
    			-- (from EV_TOOLTIPABLE_IMP)
    		require -- from EV_TOOLTIPABLE_I
    			a_tooltip_not_void: a_tooltip /= Void

    	set_top_level_window_imp (a_window: EV_WINDOW_IMP)
    			-- Make `a_window' the new top_level_window_imp
    			-- of `Current'.
    			-- (from EV_PRIMITIVE_IMP)

    	set_x (a_x: INTEGER_32)
    			-- Set x with `a_x'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	set_y (a_y: INTEGER_32)
    			-- Set y with `a_y'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	unlock_window_update
    			-- Unlock a locked window.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    feature -- Removal

    	wel_destroy
    			-- Destroy the window.
    			-- (from WEL_WINDOW)
    		require -- from  EV_WIDGET_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			not_exists: not exists

    feature -- Resizing

    	set_height (value: INTEGER_32)
    			-- Make `value' the new height of `Current'.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from WEL_WINDOW
    			exists: exists

    	set_minimum_height (value: INTEGER_32)
    			-- Make `value' the new minimum_height of `Current'.
    			-- There is no need to grow `Current' if its size is
    			-- too small, the parent will do it if necessary.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_WIDGET_I
    			a_minimum_height_positive: value >= 0
    		ensure -- from EV_WIDGET_I
    			minimum_height_assigned: is_usable implies interface.minimum_height = value

    	set_minimum_size (mw, mh: INTEGER_32)
    			-- Make `mw' the new minimum_width and `mh' the new
    			-- minimum_height of `Current'.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_WIDGET_I
    			a_minimum_width_positive: mw >= 0
    			a_minimum_height_positive: mh >= 0
    		ensure -- from EV_WIDGET_I
    			minimum_width_assigned: is_usable implies interface.minimum_width = mw
    			minimum_height_assigned: is_usable implies interface.minimum_height = mh

    	set_minimum_width (value: INTEGER_32)
    			-- Make `value' the new minimum_width of `Current'.
    			-- There is no need to grow `Current' if its size is
    			-- too small, the parent will do it if necessary.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_WIDGET_I
    			a_minimum_width_positive: value >= 0
    		ensure -- from EV_WIDGET_I
    			minimum_width_assigned: is_usable implies interface.minimum_width = value

    	set_minimum_width_in_characters (nb: INTEGER_32)
    			-- Make a minimum of `nb' characters visible on one line.
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from EV_TEXT_COMPONENT_I
    			valid_nb: nb > 0

    	set_size (w, h: INTEGER_32)
    			-- Resize `Current'.
    			-- (from EV_SIZEABLE_IMP)

    	set_width (value: INTEGER_32)
    			-- Make `value' the new width of `Current'.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from WEL_WINDOW
    			exists: exists

    feature -- Conversion

    	key_code_from_wel (a_wel_code: INTEGER_32): INTEGER_32
    			-- Corresponding key code for ``a_wel_code''.
    			-- (from EV_WEL_KEY_CONVERSION)
    		require -- from EV_WEL_KEY_CONVERSION
    			a_wel_code_valid: valid_wel_code (a_wel_code)

    	key_code_to_wel (a_key_code: INTEGER_32): INTEGER_32
    			-- Corresponding WEL code for ``a_key_code''.
    			-- (from EV_WEL_KEY_CONVERSION)
    		require -- from EV_WEL_KEY_CONVERSION
    			a_key_code_valid: valid_key_code (a_key_code)

    feature -- Duplication

    	copy (other: like Current)
    			-- Update current object using fields of object attached
    			-- to `other', so as to yield equal objects.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_equal: is_equal (other)

    	frozen deep_copy (other: like Current)
    			-- Effect equivalent to that of:
    			--		copy (`other' . deep_twin)
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, other)

    	frozen deep_twin: like Current
    			-- New object structure recursively duplicated from Current.
    			-- (from ANY)
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, Result)

    	frozen standard_copy (other: like Current)
    			-- Copy every field of `other' onto corresponding field
    			-- of current object.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_standard_equal: standard_is_equal (other)

    	frozen standard_twin: like Current
    			-- New object field-by-field identical to `other'.
    			-- Always uses default copying semantics.
    			-- (from ANY)
    		ensure -- from ANY
    			standard_twin_not_void: Result /= Void
    			equal: standard_equal (Result, Current)

    	frozen twin: like Current
    			-- New object equal to `Current'
    			-- twin calls copy; to change copying/twining semantics, redefine copy.
    			-- (from ANY)
    		ensure -- from ANY
    			twin_not_void: Result /= Void
    			is_equal: Result.is_equal (Current)

    feature -- Basic operations

    	arrow_action (direction: BOOLEAN)
    			-- Go to the next widget that takes the focus throughthe arrow
    			-- keys. If `direction' it goes to the next widget otherwise,
    			-- it goes to the previous one.
    			-- (from EV_PRIMITIVE_IMP)

    	bring_to_top
    			-- Bring this window to the top of the Z order.
    			--
    			-- Note:
    			--  * If the window is a top-level window, it is activated.
    			--  * If the window is a child window, the top-level parent window
    			--    associated with the child window is activated.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	clear
    			-- Clear the text
    			-- (from WEL_STATIC)
    		require -- from WEL_STATIC
    			exists: exists
    		ensure -- from WEL_STATIC
    			text_empty: wel_text.is_empty

    	copy_selection
    			-- Copy the current selection to the clipboard.
    			-- (from WEL_EDIT)
    		require -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection

    	clip_copy
    			-- Copy the current selection to the clipboard.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection

    	cut_selection
    			-- Cut the current selection to the clipboard.
    			-- (from WEL_EDIT)
    		require -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    			is_editable: is_editable
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from WEL_EDIT
    			has_no_selection: not has_selection

    	clip_cut
    			-- Cut the current selection to the clipboard.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from WEL_EDIT
    			has_no_selection: not has_selection

    	clip_paste
    			-- Paste at the current caret position the
    			-- content of the clipboard.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	close_dockable_dialog (dockable_dialog: EV_DOCKABLE_DIALOG)
    			-- Close request received by `dockable_dialog' so
    			-- restore widget contained back to its original position
    			-- in its old parent if possible.
    			-- We must fire `dock_ended' actions.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			dockable_dialog_destroyed: dockable_dialog.is_destroyed

    	complete_dock
    			-- Complete a dock from source_being_docked.
    			-- (from EV_DOCKABLE_SOURCE_I)
    		require -- from EV_DOCKABLE_SOURCE_I
    			source_being_docked: source_being_docked /= Void
    		ensure -- from EV_DOCKABLE_SOURCE_I
    			not_dock_executing: not is_dock_executing
    			insert_separator_not_parented: insert_sep.parent = Void
    			insert_label_not_parented: insert_label.parent = Void

    	frozen default: like Current
    			-- Default value of object's type
    			-- (from ANY)

    	frozen default_pointer: POINTER
    			-- Default value of type `POINTER'
    			-- (Avoid the need to write `p'.default for
    			-- some `p' of type `POINTER'.)
    			-- (from ANY)

    	default_process_notification (notification_code: INTEGER_32)
    			-- Process a `notification_code' which has not been
    			-- processed by process_notification.
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			exists: exists

    	default_rescue
    			-- Process exception for routines with no Rescue clause.
    			-- (Default: do nothing.)
    			-- (from ANY)

    	delete_selection
    			-- Delete the current selection.
    			-- (from WEL_EDIT)
    		require -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    			is_editable: is_editable
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from EV_TEXT_COMPONENT_I
    			has_no_selection: not has_selection
    		ensure -- from WEL_EDIT
    			has_no_selection: not has_selection

    	disable_horizontal_scroll_bar
    			-- Disable the horizontal scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	disable_vertical_scroll_bar
    			-- Disable the vertical scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	frozen do_nothing
    			-- Execute a null action.
    			-- (from ANY)

    	enable_horizontal_scroll_bar
    			-- Enable the horizontal scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	enable_vertical_scroll_bar
    			-- Enable the vertical scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	find (text_to_find: STRING_GENERAL; match_case: BOOLEAN; start_from: INTEGER_32): INTEGER_32
    			-- Find `text_to_find' in WEL_RICH_EDIT
    			-- (from WEL_RICH_EDIT)

    	go_to_next_group_item (a_parent: WEL_COMPOSITE_WINDOW; after: BOOLEAN)
    			-- Find the previous or following control with the
    			-- Wm_tabstop style in the current group in `a_parent'
    			-- depending on the value of `after'.
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			valid_parent: a_parent /= Void and then a_parent.exists

    	go_to_next_tab_item (a_parent: WEL_COMPOSITE_WINDOW; after: BOOLEAN)
    			-- Find the previous or following control with the
    			-- Wm_tabstop style in `a_parent depending on the
    			-- value of `after'.
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			valid_parent: a_parent /= Void and then a_parent.exists

    	hide_cursor
    			-- Hide the cursor.
    			-- (from WEL_WINDOWS_ROUTINES)

    	hide_horizontal_scroll_bar
    			-- Hide the horizontal scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	hide_scroll_bars
    			-- Hide the horizontal and vertical scroll bars.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	hide_selection
    			-- Hide the selection.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	hide_vertical_scroll_bar
    			-- Hide the vertical scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	insert_after (a_window: WEL_WINDOW)
    			-- Insert the current window after `a_window'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			a_window_not_void: a_window /= Void
    			a_window_not_current: a_window /= Current
    			a_window_exists: a_window.exists

    	insert_text_stream_in (stream: WEL_RICH_EDIT_STREAM_IN)
    			-- Start a text stream in operation with `stream'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	invalidate
    			-- Invalide the entire client area of the window. The
    			-- background will be erased before.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	invalidate_rect (rect: WEL_RECT; erase_background: BOOLEAN)
    			-- Invalidate the area `rect' and erase
    			-- the background if `erase_background' is True.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			rect_not_void: rect /= Void

    	invalidate_region (region: WEL_REGION; erase_background: BOOLEAN)
    			-- Invalidate the area `region' and erase
    			-- the background if `erase_background' is True.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			region_not_void: region /= Void
    			region_exists: region.exists

    	invalidate_without_background
    			-- Invalidate the entire client area of the window. The
    			-- background will not be erased.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	kill_timer (timer_id: INTEGER_32)
    			-- Kill the timer identified by `timer_id'.
    			-- See also set_timer, on_timer.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			positive_timer_id: timer_id > 0

    	load_rtf_file (file: RAW_FILE)
    			-- Load a RTF `file' in the rich edit control.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			file_not_void: file /= Void
    			file_exists: file.exists
    			file_is_open_read: file.is_open_read
    		ensure -- from WEL_RICH_EDIT
    			file_closed: file.is_closed

    	load_text_file (file: RAW_FILE)
    			-- Load a text `file' in the rich edit control.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			file_not_void: file /= Void
    			file_exists: file.exists
    			file_is_open_read: file.is_open_read
    		ensure -- from WEL_RICH_EDIT
    			file_closed: file.is_closed

    	message_beep_asterisk
    			-- Play the system asterisk waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_exclamation
    			-- Play the system exclamation waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_hand
    			-- Play the system hand waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_ok
    			-- Play the system ok waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_question
    			-- Play the system question waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	wel_move (a_x, a_y: INTEGER_32)
    			-- Move the window to `a_x', `a_y'.
    			-- (from WEL_WINDOW)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	move (a_x, a_y: INTEGER_32)
    			-- Move the window to `a_x', `a_y'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	wel_move_and_resize (a_x, a_y, a_width, a_height: INTEGER_32; repaint: BOOLEAN)
    			-- Move the window to `a_x', `a_y' position and
    			-- resize it with `a_width', `a_height'.
    			-- (from WEL_WINDOW)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	move_and_resize (a_x, a_y, a_width, a_height: INTEGER_32; repaint: BOOLEAN)
    			-- Move the window to `a_x', `a_y' position and
    			-- resize it with `a_width', `a_height'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	on_getdlgcode
    			-- Called when window receives WM_GETDLGCODE message.
    			-- (from EV_PRIMITIVE_IMP)
    		require -- from  WEL_WINDOW
    			True

    	output_debug_string (s: STRING_GENERAL)
    			-- Send a string `s' to the system debugger.
    			-- (from WEL_WINDOWS_ROUTINES)
    		require -- from WEL_WINDOWS_ROUTINES
    			s_not_void: s /= Void

    	process_tab_and_arrows_keys (virtual_key: INTEGER_32)
    			-- Process a tab or arrow key press to give the focus to the next
    			-- widget. Need to be called in the feature on_key_down when the
    			-- control need to process this kind of keys.
    			-- (from EV_PRIMITIVE_IMP)

    	process_tab_key (virtual_key: INTEGER_32)
    			-- Process a tab or arrow key press to give the focus to the next
    			-- widget. Need to be called in the feature on_key_down when the
    			-- control needs to process this kind of keys.
    			-- (from EV_PRIMITIVE_IMP)

    	put_command (a_command: WEL_COMMAND; message: INTEGER_32; argument: ANY)
    			-- Put `a_command' associated to `message'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			a_command_not_void: a_command /= Void
    			positive_message: message >= 0
    		ensure -- from WEL_WINDOW
    			command_added: command (message) = a_command and command_argument (message) = argument

    	remove_command (message: INTEGER_32)
    			-- Remove the command associated to `message'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			positive_message: message >= 0
    			command_exists: command_exists (message)
    		ensure -- from WEL_WINDOW
    			command_removed: not command_exists (message)

    	replace_selection (new_text: STRING_GENERAL)
    			-- Replace the current selection with `new_text'.
    			-- If there is no selection, `new_text' is inserted
    			-- at the current caret_position.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			new_text_not_void: new_text /= Void

    	wel_resize (a_width, a_height: INTEGER_32)
    			-- Resize the window with `a_width', `a_height'.
    			-- (from WEL_WINDOW)
    		require -- from  EV_SIZEABLE_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists

    	resize (a_width, a_height: INTEGER_32)
    			-- Resize the window with `a_width', `a_height'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	resource_string_id (an_id: INTEGER_32): STRING_32
    			-- String identified by `an_id' in the resource file.
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			result_not_void: Result /= Void

    	rtf_stream_out (stream: WEL_RICH_EDIT_STREAM_OUT)
    			-- Start a rtf stream out operation with `stream'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	save_rtf_file (file: RAW_FILE)
    			-- Save the contents of the rich edit control in RTF
    			-- format in `file'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			file_not_void: file /= Void
    			file_exists: file.exists
    			file_is_open_read: file.is_open_write
    		ensure -- from WEL_RICH_EDIT
    			file_closed: file.is_closed

    	save_text_file (file: RAW_FILE)
    			-- Save the contents of the rich edit control in text
    			-- format in `file'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			file_not_void: file /= Void
    			file_exists: file.exists
    			file_is_open_write: file.is_open_write
    		ensure -- from WEL_RICH_EDIT
    			file_closed: file.is_closed

    	scroll (horizontal, vertical: INTEGER_32)
    			-- Scroll the text vertically and horizontally.
    			-- `horizontal' is the number of characters to
    			-- scroll horizontally, `vertical' is the number
    			-- of lines to scroll vertically.
    			-- (from WEL_MULTIPLE_LINE_EDIT)
    		require -- from WEL_WINDOW
    			exists: exists

    	send_stream_in_message (format: INTEGER_32; stream: WEL_RICH_EDIT_STREAM_IN)
    			-- Start stream in operation with `stream'.
    			-- See class WEL_SF_CONSTANTS for `format' values.
    			-- Lowest level stream in procedures.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	send_stream_out_message (format: INTEGER_32; stream: WEL_RICH_EDIT_STREAM_OUT)
    			-- Start stream out operation with `stream'.
    			-- See class WEL_SF_CONSTANTS for `format' values.
    			-- Lowest level stream out procedures.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	set_class_icon (new_icon: WEL_ICON)
    			-- Replace the current icon for the class which this window
    			-- belongs to.
    			--
    			-- The SetClassLong function replaces the specified 32-bit (long)
    			-- value at the specified offset into the extra class memory
    			-- or the WNDCLASSEX structure for the class to which the
    			-- specified window belongs.
    			-- (from WEL_WINDOW)

    	set_class_small_icon (new_icon: WEL_ICON)
    			-- Replace the current icon for the class which this window
    			-- belongs to.
    			--
    			-- The SetClassLong function replaces the specified 32-bit (long)
    			-- value at the specified offset into the extra class memory
    			-- or the WNDCLASSEX structure for the class to which the
    			-- specified window belongs.
    			-- (from WEL_WINDOW)

    	set_cursor_position_absolute (x, y: INTEGER_32)
    			-- Set the cursor position to x, y.
    			-- (from WEL_WINDOWS_ROUTINES)

    	set_z_order (z_order: POINTER)
    			-- Set the z-order of the window.
    			-- See class WEL_HWND_CONSTANTS for `z_order' values.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			valid_hwnd_constant: valid_hwnd_constant (z_order)

    	show_cursor
    			-- Show the cursor.
    			-- (from WEL_WINDOWS_ROUTINES)

    	show_horizontal_scroll_bar
    			-- Show the horizontal scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	show_scroll_bars
    			-- Show the horizontal and vertical scroll bars.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	show_selection
    			-- Show selection.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists

    	show_vertical_scroll_bar
    			-- Show the vertical scroll bar.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	show_with_option (cmd_show: INTEGER_32)
    			-- Set the window's visibility with `cmd_show'.
    			-- See class WEL_SW_CONSTANTS for `cmd_show' value.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			parent_shown: wel_parent /= Void implies wel_parent.exists and wel_parent.shown

    	tab_action (direction: BOOLEAN)
    			-- Go to the next widget that takes the focus through to the tab
    			-- key. If `direction' it goes to the next widget otherwise,
    			-- it goes to the previous one.
    			-- (from EV_PRIMITIVE_IMP)

    	text_stream_out (stream: WEL_RICH_EDIT_STREAM_OUT)
    			-- Start a text stream out operation with `stream'.
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			stream_not_void: stream /= Void

    	tooltip_window: WEL_WINDOW
    			-- `Result' is WEL_WINDOW of `Current' used
    			-- to trigger tooltip events. May be redefined in
    			-- descendents that are composed of more than one window
    			-- such as combo boxes.
    			-- (from EV_PRIMITIVE_IMP)

    	undo
    			-- Undo the last operation.
    			-- The previously deleted text is restored or the
    			-- previously added text is deleted.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			can_undo: can_undo

    	deselect_all
    			-- Unselect the current selection.
    			-- (from WEL_EDIT)
    		require -- from  EV_TEXT_COMPONENT_I
    			True
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from EV_TEXT_COMPONENT_I
    			has_no_selection: not has_selection
    		ensure -- from WEL_EDIT
    			has_no_selection: not has_selection

    	unselect
    			-- Unselect the current selection.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists
    			has_selection: has_selection
    		ensure -- from WEL_EDIT
    			has_no_selection: not has_selection

    	update
    			-- Update the client area by sending a Wm_paint message.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	validate
    			-- Validate the entire client area of the window.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	validate_rect (rect: WEL_RECT)
    			-- Validate the area `rect'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			rect_not_void: rect /= Void

    	validate_region (region: WEL_REGION)
    			-- Validate the area `region'.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			region_not_void: region /= Void
    			region_exists: region.exists

    	win_help (help_file: STRING_GENERAL; a_command, data: INTEGER_32)
    			-- Start the Windows Help program with `help_file'.
    			-- `a_command' specifies the type of help requested. See
    			-- class WEL_HELP_CONSTANTS for `a_command' values.
    			-- 'data' is depandant on 'a_command'.  Check MSDN for more details.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    			help_file_not_void: help_file /= Void

    feature -- Obsolete

    	nc_minheight: INTEGER_32 is 2
    			-- Used only in the `notify_change' feature to
    			-- notify the parent that the minimum height of
    			-- `Current' has changed.
    			-- (from EV_SIZEABLE_IMP)

    	nc_minsize: INTEGER_32 is 3
    			-- Used only in the `notify_change' feature to
    			-- notify the parent that both the minimum width
    			-- and height of `Current' widget have changed.
    			-- (from EV_SIZEABLE_IMP)

    	nc_minwidth: INTEGER_32 is 1
    			-- Used only in the `notify_change' feature to
    			-- notify the parent that the minimum width of
    			-- `Current' has changed.
    			-- (from EV_SIZEABLE_IMP)

    feature -- Inapplicable

    	drag_cursor: EV_POINTER_STYLE
    			-- Cursor used when `Current' is being transported.
    			-- (from EV_DOCKABLE_SOURCE_I)

    feature -- Implementation

    	clipboard_content: STRING_32
    			-- `Result' is current clipboard content.
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from  EV_TEXT_COMPONENT_I
    			True

    	internal_disable_dockable
    			-- Enable or disable dockable.
    			-- This has no implementation on Windows, as we do not need it.
    			-- On Gtk, this is necessary, so that the necessary signal
    			-- connections may be performed.
    			-- Was declared in EV_DOCKABLE_SOURCE_IMP as synonym of internal_enable_dockable.
    			-- (from EV_DOCKABLE_SOURCE_IMP)
    		require -- from  EV_DOCKABLE_SOURCE_I
    			True

    	internal_enable_dockable
    			-- Enable or disable dockable.
    			-- This has no implementation on Windows, as we do not need it.
    			-- On Gtk, this is necessary, so that the necessary signal
    			-- connections may be performed.
    			-- Was declared in EV_DOCKABLE_SOURCE_IMP as synonym of internal_disable_dockable.
    			-- (from EV_DOCKABLE_SOURCE_IMP)
    		require -- from  EV_DOCKABLE_SOURCE_I
    			True

    feature -- Access EV_DRAGABLE_SOURCE.

    	dockable_dialog_target: EV_DOCKABLE_DIALOG
    			-- A dockable dialog that will be created as
    			-- necessary. This is not a local, to avoid it
    			-- being garbage collected.
    			-- (from EV_SHARED_TRANSPORT_I)

    	global_drag_targets: ARRAYED_LIST [INTEGER_32]
    			-- Shortcut to EV_APPLICATION.pnd_targets.
    			-- (from EV_SHARED_TRANSPORT_I)

    	insert_label: EV_CELL
    			-- Label used to indicate where `Current' will be placed in target.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			result_not_void: Result /= Void

    	insert_label_imp: EV_CELL_I
    			-- Once access to implementation of Insert_label.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			Result /= Void

    	insert_sep: EV_TOOL_BAR_SEPARATOR
    			-- Once access to a separator used to indicate the insertion position
    			-- when moving tool bar items.
    			-- (from EV_SHARED_TRANSPORT_I)

    	insert_sep_imp: EV_TOOL_BAR_SEPARATOR_I
    			-- Once access to implementation of Insert_sep.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			Result /= Void

    	internal_screen: EV_SCREEN
    			-- Once access to an EV_SCREEN.
    			-- (from EV_SHARED_TRANSPORT_I)

    	original_x_offset: INTEGER_16
    			-- Original x_offset and original_y_offset of transport
    			-- realtive to widget. Only used for dragable transports.
    			-- (from EV_SHARED_TRANSPORT_I)

    	original_y_offset: INTEGER_16
    			-- Original x_offset and original_y_offset of transport
    			-- realtive to widget. Only used for dragable transports.
    			-- (from EV_SHARED_TRANSPORT_I)

    	originating_source: EV_DOCKABLE_SOURCE_I
    			-- Dragable source that originated the transport of `source_being_dragged'.
    			-- (from EV_SHARED_TRANSPORT_I)

    	remove_insert_label
    			-- Remove Insert_label from its current parent.
    			-- We must handle a special case for cells. If the parent is a cell,
    			-- then we remove the cell from its parent, and then restore it.
    			-- Otherwise, when the label, removed, the cell keeps it size, and cells
    			-- are normally used with real_target when the cell must
    			-- not be visible.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			not_parented: insert_label.parent = Void

    	remove_insert_sep
    			-- Ensure `inset_sep' is not parented.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			not_parented: insert_sep.parent = Void

    	source_being_docked: EV_DOCKABLE_SOURCE_I
    			-- Dragable source currently being transported. May be a
    			-- WIDGET_IMP or an EV_TOOL_BAR_BUTTON_IMP.
    			-- (from EV_SHARED_TRANSPORT_I)

    feature -- Access EV_PICK_AND_DROPABLE.

    	default_accept_cursor: EV_POINTER_STYLE
    			-- Used in lieu of a user defined accept_cursor.
    			-- (from EV_SHARED_TRANSPORT_I)

    	default_deny_cursor: EV_POINTER_STYLE
    			-- Used in lieu of a user defined deny_cursor.
    			-- (from EV_SHARED_TRANSPORT_I)

    	default_pixmaps: EV_STOCK_PIXMAPS
    			-- Default pixmaps
    			-- (from EV_SHARED_TRANSPORT_I)
    		require -- from  EV_SHARED_TRANSPORT_IMP
    			True

    	global_pnd_targets: HASH_TABLE [INTEGER_32, INTEGER_32]
    			-- Shortcut to EV_APPLICATION.pnd_targets.
    			-- (from EV_SHARED_TRANSPORT_I)

    	rubber_band_is_drawn: BOOLEAN
    			-- Is a rubber band line currently on the screen?
    			-- (from EV_SHARED_TRANSPORT_I)

    feature -- Access common.

    	pointer_x: INTEGER_16
    			-- (from EV_SHARED_TRANSPORT_I)

    	pointer_y: INTEGER_16
    			-- (from EV_SHARED_TRANSPORT_I)

    feature -- Assertions

    	valid_line_index (i: INTEGER_32): BOOLEAN
    			-- Is `i' a valid line index?
    			-- (from EV_TEXT_I)

    feature -- Basic Operations

    	refresh_now
    			-- Refresh now.
    			-- (from EV_WIDGET_IMP)
    		require -- from  EV_WIDGET_I
    			True

    feature -- Basic operation

    	internal_set_minimum_height (value: INTEGER_32)
    			-- Make `value' the new minimum_height of `Current'.
    			-- Should check if the user didn't set the minimum width
    			-- before to set the new value.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_SIZEABLE_IMP
    			positive_value: value >= 0

    	internal_set_minimum_size (mw, mh: INTEGER_32)
    			-- Make `mw' the new minimum_width and `mh' the new
    			-- minimum_height of `Current'.
    			-- Should check if the user didn't set the minimum width
    			-- before to set the new value.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_SIZEABLE_IMP
    			positive_mw: mw >= 0
    			positive_mh: mh >= 0

    	internal_set_minimum_width (value: INTEGER_32)
    			-- Make `value' the new minimum_width of `Current'.
    			-- Should check if the user didn't set the minimum width
    			-- before to set the new value.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_SIZEABLE_IMP
    			positive_value: value >= 0

    	internal_set_size (mw, mh: INTEGER_32)
    			-- Set `size' of child_cell.
    			-- (from EV_SIZEABLE_IMP)
    		require -- from EV_SIZEABLE_IMP
    			positive_mw: mw >= 0
    			positive_mh: mh >= 0

    	parent_ask_resize (a_width, a_height: INTEGER_32)
    			-- Called by the parent when the size of `Current' has to be
    			-- changed to `a_width', `a_height'.
    			-- (from EV_SIZEABLE_IMP)

    	paste (index: INTEGER_32)
    			-- Insert string which is in Clipboard at
    			-- `index' postion in text.
    			-- If Clipboard is empty, it does nothing.
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from EV_TEXT_COMPONENT_I
    			index_large_enough: index >= 1
    			index_small_enough: index <= text_length + 1
    			is_editable: is_editable

    	scroll_to_line (i: INTEGER_32)
    			-- Ensure that line `i' is visible in `Current'.
    			-- (from EV_TEXT_IMP)
    		require -- from EV_TEXT_I
    			valid_line_index: valid_line_index (i)

    	search (str: STRING_GENERAL; start: INTEGER_32): INTEGER_32
    			-- Position of first occurrence of `str' at or after `start';
    			-- 0 if none.
    			-- (from EV_TEXT_I)
    		require -- from EV_TEXT_I
    			valid_string: str /= Void

    	select_all
    			-- Select all the text of `Current'.
    			-- (from EV_TEXT_COMPONENT_I)
    		require -- from WEL_EDIT
    			exists: exists
    			positive_length: wel_text_length > 0
    		require -- from EV_TEXT_COMPONENT_I
    			positive_length: text_length > 0
    		ensure -- from WEL_EDIT
    			has_selection: has_selection
    			selection_start_set: wel_selection_start = 0
    			selection_end_set: wel_selection_end <= wel_text_length + 2
    		ensure -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    			selection_start_set: selection_start = 1
    			selection_end_set: selection_end = text_length

    	set_move_and_size (a_x_position, a_y_position, a_width, a_height: INTEGER_32)
    			-- Move and resize the widget. Only the parent can call this feature
    			-- because it doesn't notify the parent of the change.
    			-- Equivalent of parent_ask_resize with move.
    			-- (from EV_SIZEABLE_IMP)

    feature -- Constants

    	key_0: INTEGER_32 is 1
    			-- (from EV_KEY_CONSTANTS)

    	key_1: INTEGER_32 is 2
    			-- (from EV_KEY_CONSTANTS)

    	key_2: INTEGER_32 is 3
    			-- (from EV_KEY_CONSTANTS)

    	key_3: INTEGER_32 is 4
    			-- (from EV_KEY_CONSTANTS)

    	key_4: INTEGER_32 is 5
    			-- (from EV_KEY_CONSTANTS)

    	key_5: INTEGER_32 is 6
    			-- (from EV_KEY_CONSTANTS)

    	key_6: INTEGER_32 is 7
    			-- (from EV_KEY_CONSTANTS)

    	key_7: INTEGER_32 is 8
    			-- (from EV_KEY_CONSTANTS)

    	key_8: INTEGER_32 is 9
    			-- (from EV_KEY_CONSTANTS)

    	key_9: INTEGER_32 is 10
    			-- (from EV_KEY_CONSTANTS)

    	key_a: INTEGER_32 is 68
    			-- (from EV_KEY_CONSTANTS)

    	key_alt: INTEGER_32 is 96
    			-- (from EV_KEY_CONSTANTS)

    	key_b: INTEGER_32 is 69
    			-- (from EV_KEY_CONSTANTS)

    	key_back_space: INTEGER_32 is 40
    			-- (from EV_KEY_CONSTANTS)

    	key_backquote: INTEGER_32 is 56
    			-- (from EV_KEY_CONSTANTS)

    	key_backslash: INTEGER_32 is 54
    			-- (from EV_KEY_CONSTANTS)

    	key_c: INTEGER_32 is 70
    			-- (from EV_KEY_CONSTANTS)

    	key_caps_lock: INTEGER_32 is 45
    			-- (from EV_KEY_CONSTANTS)

    	key_close_bracket: INTEGER_32 is 52
    			-- (from EV_KEY_CONSTANTS)

    	key_comma: INTEGER_32 is 47
    			-- (from EV_KEY_CONSTANTS)

    	key_ctrl: INTEGER_32 is 95
    			-- (from EV_KEY_CONSTANTS)

    	key_d: INTEGER_32 is 71
    			-- (from EV_KEY_CONSTANTS)

    	key_dash: INTEGER_32 is 57
    			-- (from EV_KEY_CONSTANTS)

    	key_delete: INTEGER_32 is 67
    			-- (from EV_KEY_CONSTANTS)

    	key_down_arrow: INTEGER_32 is 59
    			-- (from EV_KEY_CONSTANTS)

    	key_e: INTEGER_32 is 72
    			-- (from EV_KEY_CONSTANTS)

    	key_end: INTEGER_32 is 65
    			-- (from EV_KEY_CONSTANTS)

    	key_enter: INTEGER_32 is 41
    			-- (from EV_KEY_CONSTANTS)

    	key_equal: INTEGER_32 is 48
    			-- (from EV_KEY_CONSTANTS)

    	key_escape: INTEGER_32 is 42
    			-- (from EV_KEY_CONSTANTS)

    	key_f: INTEGER_32 is 73
    			-- (from EV_KEY_CONSTANTS)

    	key_f1: INTEGER_32 is 27
    			-- (from EV_KEY_CONSTANTS)

    	key_f10: INTEGER_32 is 36
    			-- (from EV_KEY_CONSTANTS)

    	key_f11: INTEGER_32 is 37
    			-- (from EV_KEY_CONSTANTS)

    	key_f12: INTEGER_32 is 38
    			-- (from EV_KEY_CONSTANTS)

    	key_f2: INTEGER_32 is 28
    			-- (from EV_KEY_CONSTANTS)

    	key_f3: INTEGER_32 is 29
    			-- (from EV_KEY_CONSTANTS)

    	key_f4: INTEGER_32 is 30
    			-- (from EV_KEY_CONSTANTS)

    	key_f5: INTEGER_32 is 31
    			-- (from EV_KEY_CONSTANTS)

    	key_f6: INTEGER_32 is 32
    			-- (from EV_KEY_CONSTANTS)

    	key_f7: INTEGER_32 is 33
    			-- (from EV_KEY_CONSTANTS)

    	key_f8: INTEGER_32 is 34
    			-- (from EV_KEY_CONSTANTS)

    	key_f9: INTEGER_32 is 35
    			-- (from EV_KEY_CONSTANTS)

    	key_g: INTEGER_32 is 74
    			-- (from EV_KEY_CONSTANTS)

    	key_h: INTEGER_32 is 75
    			-- (from EV_KEY_CONSTANTS)

    	key_home: INTEGER_32 is 64
    			-- (from EV_KEY_CONSTANTS)

    	key_i: INTEGER_32 is 76
    			-- (from EV_KEY_CONSTANTS)

    	key_insert: INTEGER_32 is 66
    			-- (from EV_KEY_CONSTANTS)

    	key_j: INTEGER_32 is 77
    			-- (from EV_KEY_CONSTANTS)

    	key_k: INTEGER_32 is 78
    			-- (from EV_KEY_CONSTANTS)

    	key_l: INTEGER_32 is 79
    			-- (from EV_KEY_CONSTANTS)

    	key_left: INTEGER_32 is 60
    			-- (from EV_KEY_CONSTANTS)

    	key_left_meta: INTEGER_32 is 97
    			-- (from EV_KEY_CONSTANTS)

    	key_m: INTEGER_32 is 80
    			-- (from EV_KEY_CONSTANTS)

    	key_menu: INTEGER_32 is 99
    			-- (from EV_KEY_CONSTANTS)

    	key_n: INTEGER_32 is 81
    			-- (from EV_KEY_CONSTANTS)

    	key_num_lock: INTEGER_32 is 24
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_0: INTEGER_32 is 11
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_1: INTEGER_32 is 12
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_2: INTEGER_32 is 13
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_3: INTEGER_32 is 14
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_4: INTEGER_32 is 15
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_5: INTEGER_32 is 16
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_6: INTEGER_32 is 17
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_7: INTEGER_32 is 18
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_8: INTEGER_32 is 19
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_9: INTEGER_32 is 20
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_add: INTEGER_32 is 21
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_decimal: INTEGER_32 is 26
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_divide: INTEGER_32 is 22
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_multiply: INTEGER_32 is 23
    			-- (from EV_KEY_CONSTANTS)

    	key_numpad_subtract: INTEGER_32 is 25
    			-- (from EV_KEY_CONSTANTS)

    	key_o: INTEGER_32 is 82
    			-- (from EV_KEY_CONSTANTS)

    	key_open_bracket: INTEGER_32 is 51
    			-- (from EV_KEY_CONSTANTS)

    	key_p: INTEGER_32 is 83
    			-- (from EV_KEY_CONSTANTS)

    	key_page_down: INTEGER_32 is 63
    			-- (from EV_KEY_CONSTANTS)

    	key_page_up: INTEGER_32 is 62
    			-- (from EV_KEY_CONSTANTS)

    	key_pause: INTEGER_32 is 44
    			-- (from EV_KEY_CONSTANTS)

    	key_period: INTEGER_32 is 49
    			-- (from EV_KEY_CONSTANTS)

    	key_q: INTEGER_32 is 84
    			-- (from EV_KEY_CONSTANTS)

    	key_quote: INTEGER_32 is 55
    			-- (from EV_KEY_CONSTANTS)

    	key_r: INTEGER_32 is 85
    			-- (from EV_KEY_CONSTANTS)

    	key_right: INTEGER_32 is 61
    			-- (from EV_KEY_CONSTANTS)

    	key_right_meta: INTEGER_32 is 98
    			-- (from EV_KEY_CONSTANTS)

    	key_s: INTEGER_32 is 86
    			-- (from EV_KEY_CONSTANTS)

    	key_scroll_lock: INTEGER_32 is 46
    			-- (from EV_KEY_CONSTANTS)

    	key_semicolon: INTEGER_32 is 50
    			-- (from EV_KEY_CONSTANTS)

    	key_shift: INTEGER_32 is 94
    			-- (from EV_KEY_CONSTANTS)

    	key_slash: INTEGER_32 is 53
    			-- (from EV_KEY_CONSTANTS)

    	key_space: INTEGER_32 is 39
    			-- (from EV_KEY_CONSTANTS)

    	key_t: INTEGER_32 is 87
    			-- (from EV_KEY_CONSTANTS)

    	key_tab: INTEGER_32 is 43
    			-- (from EV_KEY_CONSTANTS)

    	key_u: INTEGER_32 is 88
    			-- (from EV_KEY_CONSTANTS)

    	key_up_arrow: INTEGER_32 is 58
    			-- (from EV_KEY_CONSTANTS)

    	key_v: INTEGER_32 is 89
    			-- (from EV_KEY_CONSTANTS)

    	key_w: INTEGER_32 is 90
    			-- (from EV_KEY_CONSTANTS)

    	key_x: INTEGER_32 is 91
    			-- (from EV_KEY_CONSTANTS)

    	key_y: INTEGER_32 is 92
    			-- (from EV_KEY_CONSTANTS)

    	key_z: INTEGER_32 is 93
    			-- (from EV_KEY_CONSTANTS)

    feature -- Contract support

    	valid_key_code (a_code: INTEGER_32): BOOLEAN
    			-- Is ``a_code'' a valid key code?
    			-- (from EV_KEY_CONSTANTS)

    	valid_wel_code (a_wel_code: INTEGER_32): BOOLEAN
    			-- Is ``a_wel_code'' valid?
    			-- (from EV_WEL_KEY_CONVERSION)

    feature -- Deferred features

    	background_color: EV_COLOR
    			-- Color used for the background of `Current'.
    			-- This has been redefined as the background color of
    			-- text components is white, or `Color_read_write' by default.
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from  EV_COLORIZABLE_I
    			True

    	has_tabstop: BOOLEAN
    			-- Does `Current' exhibit all attributes to permit it to receive the
    			-- focus while tabbing?
    			-- (from EV_WIDGET_IMP)

    	next_dlggroupitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
    			-- Encapsulation of the SDK GetNextDlgGroupItem,
    			-- because we cannot do a deferred feature become an
    			-- external feature.
    			-- (from EV_WIDGET_IMP)

    	next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
    			-- Encapsulation of the SDK GetNextDlgTabItem,
    			-- because we cannot do a deferred feature become an
    			-- external feature.
    			-- (from EV_WIDGET_IMP)

    	next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
    			-- Return the next widget that may by tabbed to as a result of pressing the tab key from `start_widget'.
    			-- `search_pos' is the index where searching must start from for containers, and `forwards' determines the
    			-- tabbing direction. If `search_pos' is less then 1 or more than count for containers, the parent of the
    			-- container must be searched next.
    			-- (from EV_WIDGET_IMP)
    		require -- from EV_WIDGET_IMP
    			start_widget_not_void: start_widget /= Void
    		ensure -- from EV_WIDGET_IMP
    			result_not_void: Result /= Void

    	next_tabstop_widget_from_parent (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
    			-- Return the next widget that may be tabbed to as a result of pressing the tab key from `start_widget'
    			-- by visiting the parent of `Current' with a search index determined by `search_pos' and `forwards'.
    			-- (from EV_WIDGET_IMP)
    		require -- from EV_WIDGET_IMP
    			start_widget_not_void: start_widget /= Void
    		ensure -- from EV_WIDGET_IMP
    			result_not_void: Result /= Void

    	on_size (size_type, a_width, a_height: INTEGER_32)
    			-- `Current' has been resized.
    			-- (from EV_WIDGET_IMP)
    		require -- from WEL_WINDOW
    			exists: exists

    	return_current_if_next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
    			-- If `Current' is not equal to `start_widget' then return `Current' but only if `search_pos' is 1 and `forwards' or
    			-- `search_pos' is 0 and not `forwards. This ensures that we return a container in the correct order (before or after)
    			-- its children dependent on the state of `forwards'.
    			-- (from EV_WIDGET_IMP)
    		require -- from EV_WIDGET_IMP
    			start_widget_not_void: start_widget /= Void

    	start_widget_searched_cell: CELL [INTEGER_32]
    			-- A cell to hold the seach index that the item tabbed from started with.
    			-- This is necessary to prevent infinite recursion in the
    			-- case where there is no next item as if we return to the
    			-- original widget with the same search position, then we know we have exhausted all other possibilities.
    			-- (from EV_WIDGET_IMP)

    	wel_background_color: WEL_COLOR_REF
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from WEL_COLOR_CONTROL
    			exists: exists
    		require -- from  EV_WIDGET_IMP
    			True
    		ensure -- from WEL_COLOR_CONTROL
    			background_color_not_void: Result /= Void

    	wel_foreground_color: WEL_COLOR_REF
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from WEL_COLOR_CONTROL
    			exists: exists
    		require -- from  EV_WIDGET_IMP
    			True
    		ensure -- from WEL_COLOR_CONTROL
    			foreground_color_not_void: Result /= Void

    feature -- Element Change

    	set_default_processing (value: BOOLEAN)
    			-- Enable or disable default processing of window messages.
    			-- (from WEL_RETURN_VALUE)
    		ensure -- from WEL_RETURN_VALUE
    			value_set: default_processing = value

    	set_message_return_value (value: POINTER)
    			-- Set the window-procedure-return-value.
    			-- (from WEL_RETURN_VALUE)
    		ensure -- from WEL_RETURN_VALUE
    			has_return_value: has_return_value
    			value_set: message_return_value = value

    feature -- Event handling

    	caret_move_actions: EV_INTEGER_ACTION_SEQUENCE
    			-- Actions to be performed when caret position changes.
    			-- (from EV_RICH_TEXT_ACTION_SEQUENCES_I)
    		ensure -- from EV_RICH_TEXT_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	change_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when text changes.
    			-- (from EV_TEXT_COMPONENT_ACTION_SEQUENCES_I)
    		ensure -- from EV_TEXT_COMPONENT_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	conforming_pick_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when a pebble that fits here is picked.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	create_change_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a change action sequence.
    			-- (from EV_TEXT_COMPONENT_ACTION_SEQUENCES_IMP)
    		require -- from  EV_TEXT_COMPONENT_ACTION_SEQUENCES_I
    			True

    	create_conforming_pick_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a conforming_pick action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_focus_in_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a focus_in action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_focus_out_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a focus_out action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_key_press_actions: EV_KEY_ACTION_SEQUENCE
    			-- Create a key_press action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_key_press_string_actions: EV_KEY_STRING_ACTION_SEQUENCE
    			-- Create a key_press_string action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_key_release_actions: EV_KEY_ACTION_SEQUENCE
    			-- Create a key_release action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_mouse_wheel_actions: EV_INTEGER_ACTION_SEQUENCE
    			-- Create a mouse_wheel action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_pick_actions: EV_PND_START_ACTION_SEQUENCE
    			-- Create a pick action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE
    			-- Create a pick ended action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Create a pointer_button_press action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_pointer_button_release_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Create a pointer_button_release action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Create a pointer_double_press action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_pointer_enter_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a pointer_enter action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a pointer_leave action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
    			-- Create a pointer_motion action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	create_resize_actions: EV_GEOMETRY_ACTION_SEQUENCE
    			-- Create a resize action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

    	dock_ended_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed after a dock completes from `Current'.
    			-- Either to a dockable target or a dockable dialog.
    			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
    		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	dock_started_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when pebble is picked up.
    			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
    		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	drop_actions: EV_PND_ACTION_SEQUENCE
    			-- Actions to be performed when a pebble is dropped here.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	file_access_actions: EV_INTEGER_ACTION_SEQUENCE
    			-- Actions to be performed while loading or saving.
    			-- Event data is percentage of file written (0-100).
    			-- (from EV_RICH_TEXT_ACTION_SEQUENCES_I)
    		ensure -- from EV_RICH_TEXT_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	file_drop_actions: ACTION_SEQUENCE [TUPLE [LIST [STRING_32]]]
    			-- Actions to be performed when an OS file drop occurs on `Current'.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	focus_in_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when keyboard focus is gained.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	focus_out_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when keyboard focus is lost.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	key_press_actions: EV_KEY_ACTION_SEQUENCE
    			-- Actions to be performed when a keyboard key is pressed.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	key_press_string_actions: EV_KEY_STRING_ACTION_SEQUENCE
    			-- Actions to be performed when a keyboard press generates a displayable character.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	key_release_actions: EV_KEY_ACTION_SEQUENCE
    			-- Actions to be performed when a keyboard key is released.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	mouse_wheel_actions: EV_INTEGER_ACTION_SEQUENCE
    			-- Actions to be performed when mouse wheel is rotated.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pick_actions: EV_PND_START_ACTION_SEQUENCE
    			-- Actions to be performed when pebble is picked up.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE
    			-- Actions to be performed when a transport from `Current' ends.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer button is pressed.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_button_release_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer button is released.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer is double clicked.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_enter_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer enters widget.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer leaves widget.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer moves.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	resize_actions: EV_GEOMETRY_ACTION_SEQUENCE
    			-- Actions to be performed when size changes.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	selection_change_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when selection changes.
    			-- (from EV_RICH_TEXT_ACTION_SEQUENCES_I)
    		ensure -- from EV_RICH_TEXT_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    feature -- Externals

    	cwin_get_next_dlggroupitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
    			-- SDK GetNextDlgGroupItem
    			-- (from WEL_CONTROL)

    	cwin_get_next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
    			-- SDK GetNextDlgGroupItem
    			-- (from WEL_CONTROL)

    	cwin_show_window (hwnd: POINTER; cmd_show: INTEGER_32)
    			-- SDK ShowWindow
    			-- (from WEL_WINDOW)

    feature -- Feature that should be directly implemented by externals

    	show_window (hwnd: POINTER; cmd_show: INTEGER_32)
    			-- Encapsulation of the cwin_show_window function of
    			-- WEL_WINDOW. Normaly, we should be able to have directly
    			-- cwin_show_window deferred but it does not wotk because
    			-- it would be implemented by an external.
    			-- (from EV_WIDGET_IMP)

    feature -- Notifications

    	on_en_errspace
    			-- Cannot allocate enough memory to
    			-- meet a specific request.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	on_en_hscroll
    			-- The user click on the horizontal scroll bar.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	on_en_killfocus
    			-- Lose the keyboard focus.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	on_en_maxtext
    			-- The current text insertion has exceeded
    			-- the specified number of characters.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	on_en_msgfilter (a_msg_filter: WEL_MSG_FILTER)
    			-- Notfication of a keyboard or mouse event in the control.
    			-- Only notfications are sent that are enabled
    			-- in the event_mask.
    			-- Note:
    			-- To prevent the Rich Edit Control from handling the message
    			-- indicated with `a_msg_filter' call ignore_filtered_message
    			-- (from WEL_RICH_EDIT)
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			msg_filter_exists: a_msg_filter /= Void and then a_msg_filter.exists

    	on_en_setfocus
    			-- Receive the keyboard focus.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	on_en_update
    			-- The control is about to display altered text.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    	on_en_vscroll
    			-- The user click on the vertical scroll bar.
    			-- (from WEL_EDIT)
    		require -- from WEL_EDIT
    			exists: exists

    feature -- Output

    	io: STD_FILES
    			-- Handle to standard file setup
    			-- (from ANY)

    	out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of tagged_out.
    			-- (from ANY)

    	print (some: ANY)
    			-- Write terse external representation of `some'
    			-- on standard output.
    			-- (from ANY)

    	frozen tagged_out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of out.
    			-- (from ANY)

    feature -- Platform

    	operating_environment: OPERATING_ENVIRONMENT
    			-- Objects available from the operating system
    			-- (from ANY)

    feature -- Position

    	set_position (new_x_position: INTEGER_32; new_y_position: INTEGER_32)
    			-- Put at horizontal position `new_x_position' and at
    			-- vertical position `new_y_position' relative to parent.
    			-- (from EV_SIZEABLE_IMP)

    feature -- Registration

    	is_registered: BOOLEAN
    			-- Is `window' registered?
    			-- (from WEL_WINDOW)

    	frozen register_current_window
    			-- Register `Current' in window manager.
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			registered: is_registered

    feature -- Status Report

    	wel_current_line_number: INTEGER_32
    			-- Returns the number of the line the cursor currently
    			-- is on.
    			-- (from EV_TEXT_IMP)
    		ensure -- from EV_TEXT_I
    			valid_line_index: valid_line_index (Result)

    	current_line_number: INTEGER_32
    			-- Returns the number of the line the cursor currently
    			-- is on.
    			-- (from EV_TEXT_IMP)
    		require -- from WEL_MULTIPLE_LINE_EDIT
    			exists: exists
    		ensure -- from EV_TEXT_I
    			valid_line_index: valid_line_index (Result)
    		ensure -- from WEL_MULTIPLE_LINE_EDIT
    			positive_result: Result >= 0
    			result_small_enough: Result < wel_line_count

    	selected_text: STRING_32
    			-- Text currently selected in `Current'.
    			-- (from EV_TEXT_IMP)
    		require -- from EV_TEXT_COMPONENT_I
    			has_selection: has_selection
    		require -- from WEL_RICH_EDIT
    			exists: exists
    			has_selection: has_selection

    feature -- Status Settings

    	append_text (txt: STRING_GENERAL)
    			-- Append `txt' to end of text.
    			-- (from EV_TEXT_IMP)
    		require -- from EV_TEXT_COMPONENT_I
    			valid_text: txt /= Void

    feature -- Tooltip Flag constants

    	ttf_centertip: INTEGER_32 is 2
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttf_idishwnd: INTEGER_32 is 1
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttf_rtlreading: INTEGER_32 is 4
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttf_subclass: INTEGER_32 is 16
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- Tooltip message constants

    	ttm_activate: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_addtool: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_deltool: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_enumtools: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_getcurrenttool: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_getdelaytime: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_getmaxtipwidth: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettext: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettipbkcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettiptextcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettoolcount: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettoolinfo: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_hittest: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_newtoolrect: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_relayevent: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_setdelaytime: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_setmaxtipwidth: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_settipbkcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_settiptextcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_settoolinfo: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_updatetiptext: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_windowfrompoint: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- Tooltip style constants

    	tts_alwaystip: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	tts_noprefix: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- Tooltip time delay constants

    	ttdt_automatic: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttdt_autopop: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttdt_initial: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttdt_reshow: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- WEL Implementation

    	background_brush: WEL_BRUSH
    			-- Current window background color used to refresh the window when
    			-- requested by the WM_ERASEBKGND windows message.
    			-- (from EV_TEXT_IMP)
    		require -- from  WEL_WINDOW
    			True
    		ensure -- from WEL_WINDOW
    			new_object: Result /= Void implies Result /= background_brush

    	disable
    			-- Disable mouse and keyboard input
    			-- (from EV_TEXT_IMP)
    		require -- from  EV_WIDGET_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			disabled: not is_sensitive

    	enable
    			-- Enable mouse and keyboard input.
    			-- (from EV_TEXT_IMP)
    		require -- from  EV_WIDGET_IMP
    			True
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			enabled: is_sensitive

    feature -- element change

    	maximum_character_width: INTEGER_32
    			-- `Result' is width of widest character (W), when displayed.
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from  EV_TEXT_COMPONENT_I
    			True

    	prepend_text (txt: STRING_GENERAL)
    			-- Prepend 'txt' to text of `Current'.
    			-- (from EV_TEXT_COMPONENT_IMP)
    		require -- from EV_TEXT_COMPONENT_I
    			valid_text: txt /= Void

    invariant
    		-- from EV_WIDGET_I
    	is_displayed_implies_show_requested: is_usable and is_displayed implies is_show_requested

    		-- from EV_PICK_AND_DROPABLE_I
    	user_interface_modes_mutually_exclusive: mode_is_pick_and_drop.to_integer + mode_is_drag_and_drop.to_integer + mode_is_target_menu.to_integer = 1
    	pebble_function_takes_two_integer_open_operands: pebble_function /= Void implies pebble_function.valid_operands ([1, 1])

    		-- from EV_ANY_I
    	interface_coupled: is_usable implies interface /= Void and then interface.implementation = Current
    	base_make_called: base_make_called

    		-- from ANY
    	reflexive_equality: standard_is_equal (Current)
    	reflexive_conformance: conforms_to (Current)

    		-- from EV_DOCKABLE_SOURCE_I
    	widget_or_item_source: not (widget_source_being_docked /= Void and item_source_being_docked /= Void)
    	dock_executing: is_dock_executing implies widget_source_being_docked /= Void or item_source_being_docked /= Void

    		-- from EV_POSITIONED_I
    	minimum_width_positive_or_zero: is_usable implies minimum_width >= 0
    	minimum_height_positive_or_zero: is_usable implies minimum_height >= 0

    		-- from WEL_EDIT
    	consistent_selection: exists and then has_selection implies wel_selection_start >= 0 and then wel_selection_start <= wel_text_length and then wel_selection_end >= 0 and then wel_selection_end <= wel_text_length + 2 and then wel_selection_start < wel_selection_end
    	valid_caret_position: exists implies internal_caret_position >= 0 and then internal_caret_position <= wel_text_length + 2

    		-- from EV_RICH_TEXT_BUFFERING_STRUCTURES_I
    	rich_text_not_void: rich_text /= Void

    indexing
    	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
    	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
    	source: "[
    		Eiffel Software
    		356 Storke Road, Goleta, CA 93117 USA
    		Telephone 805-685-1006, Fax 805-685-6869
    		Website http://www.eiffel.com
    		Customer support http://support.eiffel.com
    	]"

    end -- class EV_RICH_TEXT_IMP