    indexing
    	description: "[
    				Control that displays a multi-column list of items.

    				Note: The common controls dll (WEL_COMMON_CONTROLS_DLL) needs to
    					be loaded to use this control.
    	]"
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date: 2006-03-22 23:29:03 -0800 (Wed, 22 Mar 2006) $"
    	revision: "$Revision: 57641 $"

    class interface
    	WEL_LIST_VIEW

    create
    	make (a_parent: WEL_WINDOW; a_x, a_y, a_width, a_height, an_id: INTEGER_32)
    			-- Make a List view control.
    		require
    			a_parent_not_void: a_parent /= Void
    		ensure
    			exists: exists
    			parent_set: parent = a_parent
    			id_set: id = an_id

    	make_by_id (a_parent: WEL_DIALOG; an_id: INTEGER_32)
    			-- Make a control identified by `an_id' with `a_parent'
    			-- as parent.
    			-- (from WEL_CONTROL)
    		require -- from WEL_CONTROL
    			a_parent_not_void: a_parent /= Void
    			positive_id: an_id > 0
    		ensure -- from WEL_CONTROL
    			parent_set: parent = a_parent
    			id_set: id = an_id

    feature -- Access

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

    	default_processing: BOOLEAN
    			-- (from WEL_RETURN_VALUE)

    	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

    	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)

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

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

    	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

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

    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

    	background_brush: WEL_BRUSH
    			-- Current window background color used to refresh the window when
    			-- requested by the WM_ERASEBKGND windows message.
    			-- By default there is no background
    			-- (from WEL_WINDOW)
    		ensure -- from WEL_WINDOW
    			new_object: Result /= Void implies Result /= background_brush

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

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

    	column_count: INTEGER_32
    			-- Number of columns

    	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)

    	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
    			-- Number of item in the list view
    		require
    			exists: exists

    	enabled: BOOLEAN
    			-- Is the window enabled for mouse and keyboard input?
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			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)
    		ensure -- from WEL_ANY
    			Result = (item /= default_pointer)

    	focus_item: INTEGER_32
    			-- Zero-based index of the item that has the focus
    			-- Return -1 if there is none.
    		require
    			exists: exists
    		ensure
    			result_large_enough: Result >= -1
    			result_small_enough: Result < count

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

    	get_background_color: WEL_COLOR_REF
    			-- `Result' is background color used for control.

    	get_cell_text (isub_item, iitem: INTEGER_32): STRING_32
    			-- Get the label of the cell with coordinates `isub_item', `iiitem'.
    		require
    			exists: exists
    			iitem_large_enough: iitem >= 0
    			isub_item_large_enough: isub_item >= 0
    			iitem_small_enough: iitem < count
    			isub_item_small_enough: isub_item < column_count

    	get_column_width (column: INTEGER_32): INTEGER_32
    			-- Width of the zero-based `index'-th item.
    		require
    			exists: exists
    			index_large_enough: column >= 0
    			index_small_enough: column < column_count

    	get_extended_view_style: INTEGER_32
    			-- Gets extended styles in list view controls.
    		require
    			function_supported: comctl32_version >= version_470

    	get_item (index, subitem: INTEGER_32): WEL_LIST_VIEW_ITEM
    			-- Return a representation of the item at the
    			-- `index' position.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < count
    			subitem_large_enough: subitem >= 0
    			subitem_small_enough: subitem < column_count

    	get_item_position (index: INTEGER_32): WEL_POINT
    			-- Retrieves the position of the zero-based `index'-th item.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < count

    	get_item_rect (index: INTEGER_32): WEL_RECT
    			-- Retrieves the position of the zero-based `index'-th item.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index <= count

    	get_item_state (index, mask: INTEGER_32): INTEGER_32
    			-- State of the zero-based `index'-th item. The mask give
    			-- the state informations to retrieve. See WEL_LVIS_CONSTANTS for
    			-- the value of the mask.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < count

    	get_text_background_color: WEL_COLOR_REF
    			-- `Result' is background color of item text.

    	get_text_foreground_color: WEL_COLOR_REF
    			-- `Result' is foreground color for item text.

    	get_tooltip: WEL_TOOLTIP
    			-- `Result' is tooltip associated with `Current'.

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

    	has_focus: BOOLEAN
    			-- Does this window have the focus?
    			-- (from WEL_WINDOW)
    		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_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)

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

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

    	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

    	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

    	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))

    	selected_count: INTEGER_32
    			-- Number of selected items in the list view window
    		require
    			exists: exists

    	selected_item: INTEGER_32
    			-- Contains the top most selected index.
    			-- -1 if no item is selected.
    		require
    			exists: exists
    		ensure
    			result_valid: selected_count > 0 implies Result >= 0

    	selected_items: ARRAY [INTEGER_32]
    			-- Contains all the selected index. Only one in
    			-- case of a single selection list view.
    		require
    			exists: exists
    		ensure
    			result_not_void: Result /= Void
    			result_valid: Result.count = selected_count

    	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

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

    	text: STRING_32
    			-- Window text
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			result_not_void: Result /= Void

    	text_length: INTEGER_32
    			-- Text length
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			positive_result: Result >= 0

    	top_index: INTEGER_32
    			-- Index of the first visible item
    		require
    			exists
    		ensure
    			result_large_enough: Result >= 0
    			result_small_enough: Result <= count

    	visible_count: INTEGER_32
    			-- Number of items that will fit in the list view window
    		require
    			exists: exists

    	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_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

    	x: INTEGER_32
    			-- Window x position
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			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
    			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

    	disable
    			-- Disable mouse and keyboard input
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			disabled: not enabled

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

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

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

    	ensure_visible (an_index: INTEGER_32)
    			-- Ensure that column `an_index' is completely visible in `Current'.
    		require
    			exists: exists
    			index_large_enough: an_index >= 0
    			index_small_enough: an_index < count

    	hide
    			-- Hide the window
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			hidden: not shown

    	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

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

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

    	set_background_color (a_color: WEL_COLOR_REF)
    			-- Assign `a_color' to background of `Current'.

    	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 has_capture
    			has_not_heavy_capture: not has_heavy_capture
    		ensure -- from WEL_WINDOW
    			has_capture: has_capture

    	set_cell_text (isub_item, iitem: INTEGER_32; txt: STRING_GENERAL)
    			-- Set the label of the cell with coordinates `isub_item', item
    			-- with `txt'.
    		require
    			exists: exists
    			isub_item_large_enough: isub_item >= 0
    			iitem_large_enough: iitem >= 0
    			isub_item_small_enough: isub_item < column_count
    			iitem_small_enough: iitem < count

    	set_column_format (index: INTEGER_32; fmt: INTEGER_32)
    			-- Set the alignment of the column, cannot be used for
    			-- the first column that must be left aligned.
    		require
    			exists: exists
    			index_large_enough: index > 0
    			index_small_enough: index < column_count
    			good_format: valid_lvcfmt_constant (fmt)

    	set_column_title (txt: STRING_GENERAL; index: INTEGER_32)
    			-- Make `txt' the new title of the `index'-th column.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < column_count

    	set_column_width (value, index: INTEGER_32)
    			-- Make `value' the new width of the zero-base `index'-th column.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < column_count

    	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_extended_view_style (a_new_style: INTEGER_32)
    			-- Sets extended styles in list view controls.
    		require
    			function_supported: comctl32_version >= version_470

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

    	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_image_list (an_imagelist: WEL_IMAGE_LIST)
    			-- Set the current "large" image list to `an_imagelist'.
    			-- If `an_imagelist' is set to Void, it removes
    			-- the current associated image list (if any).

    	set_item_count (value: INTEGER_32)
    			-- Prepares a list view control for adding a large number
    			-- of items and make it then faster.
    		require
    			exists: exists
    			value_big_enough: value >= 0

    	set_item_state (index, state: INTEGER_32)
    			-- Set state of item at `index' with `state'.
    			-- See class WEL_LVIS_CONSTANTS for possible `state' values.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < count

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

    	set_small_image_list (an_imagelist: WEL_IMAGE_LIST)
    			-- Set the current "small" image list to `an_imagelist'.
    			-- If `an_imagelist' is set to Void, it removes
    			-- the current associated image list (if any).

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

    	set_text_background_color (a_color: WEL_COLOR_REF)
    			-- Assign `a_color' to background color of item text.

    	set_text_foreground_color (a_color: WEL_COLOR_REF)
    			-- Assign `a_color' to foreground color for item text.

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

    	show
    			-- Show the window
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

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

    	update_item (index: INTEGER_32)
    			-- Update the list view.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < count

    feature -- Element change

    	append_column (column: WEL_LIST_VIEW_COLUMN)
    			-- Append `column' to the list view.
    		require
    			exists: exists
    		ensure
    			new_column_count: column_count = old column_count + 1

    	delete_column (index: INTEGER_32)
    			-- Remove the zero-based `index'-th column of the list view.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < column_count
    		ensure
    			new_column_count: column_count = old column_count - 1

    	delete_item (index: INTEGER_32)
    			-- Remove the zero-based `index'-th item of the list view.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index < count
    		ensure
    			new_count: count = old count - 1

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

    	enable_redraw
    			-- Ensure `Current' is redrawn as required.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

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

    	insert_column (column: WEL_LIST_VIEW_COLUMN; index: INTEGER_32)
    			-- Insert `column' at the zero-based `index'.
    		require
    			exists: exists
    			index_large_enough: index >= 0
    			index_small_enough: index <= column_count
    		ensure
    			new_column_count: column_count = old column_count + 1

    	insert_item (an_item: WEL_LIST_VIEW_ITEM)
    			-- Insert item in the list-view. The zero-based position of the item is
    			-- given by the `iitem' attribute of the item.
    		require
    			exists: exists
    			index_large_enough: an_item.iitem >= 0
    			index_small_enough: an_item.iitem <= count
    		ensure
    			new_count: count = old count + 1

    	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

    	prepend_column (column: WEL_LIST_VIEW_COLUMN)
    			-- Prepend `column' to the list view.
    		require
    			exists: exists
    		ensure
    			new_column_count: column_count = old column_count + 1

    	replace_item (an_item: WEL_LIST_VIEW_ITEM)
    			-- Set the properties of `an_item'.
    			-- The zero-based position of the item is given by the
    			-- `iitem' attribute of the item.
    		require
    			exists: exists
    			index_large_enough: an_item.iitem >= 0
    			index_small_enough: an_item.iitem <= count

    	reset_content
    			-- Reset the content of the list.
    		require
    			exists: exists
    		ensure
    			new_count: count = 0

    	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 font.item = a_font.item

    	set_height (a_height: INTEGER_32)
    			-- Set height with `a_height'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

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

    	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_text (a_text: STRING_GENERAL)
    			-- Set the window text
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			text_set_when_not_void: a_text /= Void implies text.is_equal (a_text)
    			text_set_when_void: a_text = Void implies text.count = 0

    	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_width (a_width: INTEGER_32)
    			-- Set width with `a_width'
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	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

    	destroy
    			-- Destroy the window.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists
    		ensure -- from WEL_WINDOW
    			not_exists: not exists

    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

    	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

    	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)

    	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

    	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_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_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

    	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

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

    	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)

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

    	scroll (a_x, a_y: INTEGER_32)
    			-- Scroll the contents of the window's client area.
    			-- `a_x' and `a_y' specify the amount of horizontal
    			-- and vertical scrolling.
    			-- (from WEL_WINDOW)
    		require -- from WEL_WINDOW
    			exists: exists

    	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_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_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_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: parent /= Void implies parent.exists and parent.shown

    	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 -- "Shell and Common controls" Versions

    	comctl32_version: INTEGER_32
    			-- Version of Comctl32.dll
    			-- (from WEL_WINDOWS_VERSION)

    	shell32_version: INTEGER_32
    			-- Version of Shell32.dll
    			-- (from WEL_WINDOWS_VERSION)

    	shlwapi_version: INTEGER_32
    			-- Version of Shlwapi.dll
    			-- (from WEL_WINDOWS_VERSION)

    feature -- Basic Operations

    	search (a_search_info: WEL_LIST_VIEW_SEARCH_INFO; a_starting_index: INTEGER_32): INTEGER_32
    			-- Search list view item according to `a_search_info'.
    			-- Search starts after zero based index `a_starting_index'.
    			-- If `a_starting_index' is -1 then search all items.
    			-- Result is zero based index of found item or -1 if item was not found.
    		require
    			non_void_search_info: a_search_info /= Void
    			valid_search_info: a_search_info.exists
    			valid_starting_index: a_starting_index >= -1 and a_starting_index < count

    feature -- Compatible Windows Versions

    	is_windows_2000_compatible: BOOLEAN
    			-- Is the current program running under Windows 2000 or above?
    			-- (from WEL_WINDOWS_VERSION)

    	is_windows_98_compatible: BOOLEAN
    			-- Is the current program running under Windows 98 or above?
    			-- (from WEL_WINDOWS_VERSION)

    	is_windows_9x: BOOLEAN
    			-- Is the current program running under Windows 9x
    			-- (Windows 95, Windows 98, Windows Me, ...)?
    			-- (from WEL_WINDOWS_VERSION)

    	is_windows_me_compatible: BOOLEAN
    			-- Is the current program running under Windows Me or above?
    			-- (from WEL_WINDOWS_VERSION)

    	is_windows_nt: BOOLEAN
    			-- Is the current program running under a version of
    			-- windows belonging to the NT family?
    			-- (Windows NT 3.51, Windows NT4, Windows 2000,
    			-- Windows XP Home/Professional)
    			-- (from WEL_WINDOWS_VERSION)

    	is_windows_nt4_compatible: BOOLEAN
    			-- Is the current program running under Windows NT4 or above?
    			-- (from WEL_WINDOWS_VERSION)

    	is_windows_xp_compatible: BOOLEAN
    			-- Is the current program running under Windows XP or above?
    			-- (from WEL_WINDOWS_VERSION)

    feature -- Current Windows Version

    	build_number: INTEGER_32
    			-- Build number of current operating system
    			-- (from WEL_WINDOWS_VERSION)
    		require -- from WEL_WINDOWS_VERSION
    			windows_nt_family: is_windows_nt

    	major_version: INTEGER_32
    			-- Major version of current operating system
    			-- (from WEL_WINDOWS_VERSION)

    	minor_version: INTEGER_32
    			-- Minor version of current operating system
    			-- (from WEL_WINDOWS_VERSION)

    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 -- Exact Windows Versions

    	is_windows_2000: BOOLEAN
    			-- Is the current program running under Windows 2000?
    			-- (from WEL_WINDOWS_VERSION)
    		ensure -- from WEL_WINDOWS_VERSION
    			windows2000_is_nt: Result implies is_windows_nt

    	is_windows_95: BOOLEAN
    			-- Is the current program running under Windows 95
    			-- (OSR1, OSR2 or OSR2.5)?
    			-- (from WEL_WINDOWS_VERSION)
    		ensure -- from WEL_WINDOWS_VERSION
    			windows95_is_9x: Result implies is_windows_9x

    	is_windows_98: BOOLEAN
    			-- Is the current program running under Windows 98
    			-- (1st or 2nd edition)?
    			-- (from WEL_WINDOWS_VERSION)
    		ensure -- from WEL_WINDOWS_VERSION
    			windows98_is_9x: Result implies is_windows_9x

    	is_windows_me: BOOLEAN
    			-- Is the current program running under Windows Millenium Edition?
    			-- (from WEL_WINDOWS_VERSION)
    		ensure -- from WEL_WINDOWS_VERSION
    			windows_me_is_9x: Result implies is_windows_9x

    	is_windows_nt4: BOOLEAN
    			-- Is the current program running under Windows NT4?
    			-- (from WEL_WINDOWS_VERSION)
    		ensure -- from WEL_WINDOWS_VERSION
    			windows_nt4_is_nt: Result implies is_windows_nt

    	is_windows_xp: BOOLEAN
    			-- Is the current program running under Windows XP (Home or Professional)?
    			-- (from WEL_WINDOWS_VERSION)
    		ensure -- from WEL_WINDOWS_VERSION
    			windows_xp_is_nt: Result implies is_windows_nt

    feature -- Notifications

    	on_lvn_begindrag (info: WEL_NM_LIST_VIEW)
    			-- A drag-and-drop operation involving the left mouse
    			-- button is being initiated.
    		require
    			exists: exists

    	on_lvn_beginlabeledit (info: WEL_LIST_VIEW_ITEM)
    			-- A label editing for an item has started.
    		require
    			exists: exists

    	on_lvn_beginrdrag (info: WEL_NM_LIST_VIEW)
    			-- A drag-and-drop operation involving the right mouse
    			-- button is being initiated.
    		require
    			exists: exists

    	on_lvn_columnclick (info: WEL_NM_LIST_VIEW)
    			-- A column was tapped.
    		require
    			exists: exists

    	on_lvn_deleteallitems (info: WEL_NM_LIST_VIEW)
    			-- All the items were deleted.
    		require
    			exists: exists

    	on_lvn_deleteitem (info: WEL_NM_LIST_VIEW)
    			-- An item was deleted.
    		require
    			exists: exists

    	on_lvn_endlabeledit (info: WEL_LIST_VIEW_ITEM)
    			-- A label editing for an item has ended.
    		require
    			exists: exists

    	on_lvn_getdispinfo (info: WEL_LIST_VIEW_ITEM)
    			-- It is a request for the parent window to
    			-- provide information needed to display or
    			-- sort a list view item.
    		require
    			exists: exists

    	on_lvn_insertitem (info: WEL_NM_LIST_VIEW)
    			-- A new item was inserted.
    		require
    			exists: exists

    	on_lvn_itemchanged (info: WEL_NM_LIST_VIEW)
    			-- An item has changed.
    		require
    			exists: exists

    	on_lvn_itemchanging (info: WEL_NM_LIST_VIEW)
    			-- An item is changing
    		require
    			exists: exists

    	on_lvn_keydown (virtual_key: INTEGER_32)
    			-- A key has been pressed.
    		require
    			exists: exists

    	on_lvn_setdispinfo (info: WEL_LIST_VIEW_ITEM)
    			-- The list must update the information it maintains
    			-- for an item.
    		require
    			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 -- 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 {ANY} -- Validation

    	is_valid_list_view_flag (a_flag: INTEGER_32): BOOLEAN
    			-- Is `a_flag' a valid list view search flag?
    			-- (from WEL_LIST_VIEW_CONSTANTS)

    	valid_lvcfmt_constant (value: INTEGER_32): BOOLEAN
    			-- Is `value' a valid lvcfmt constant?
    			-- (from WEL_LIST_VIEW_CONSTANTS)

    	valid_lvis_constants (value: INTEGER_32): BOOLEAN
    			-- Is `value' a valid "Item Styles" constant?
    			-- (from WEL_LIST_VIEW_CONSTANTS)

    feature -- Version Constants

    	version_400: INTEGER_32 is 262144
    			-- version_400 <=> Microsoft Windows 95/Windows NT 4.0
    			-- (from WEL_WINDOWS_VERSION)

    	version_470: INTEGER_32 is 262214
    			-- version_470 <=> Microsoft Internet Explorer 3.x
    			-- (from WEL_WINDOWS_VERSION)

    	version_471: INTEGER_32 is 262215
    			-- version_471 <=> Microsoft Internet Explorer 4.0
    			-- (from WEL_WINDOWS_VERSION)

    	version_472: INTEGER_32 is 262216
    			-- version_472 <=> Microsoft Internet Explorer 4.01 & Windows 98
    			-- (from WEL_WINDOWS_VERSION)

    	version_500: INTEGER_32 is 327680
    			-- version_500 (Shlwapi.dll) <=> Microsoft Internet Explorer 5
    			-- version_500 (Shell32.dll) <=> Microsoft Windows 2000
    			-- (from WEL_WINDOWS_VERSION)

    	version_580: INTEGER_32 is 327760
    			-- version_580 (Comctl32.dll) <=> Microsoft Internet Explorer 5
    			-- (from WEL_WINDOWS_VERSION)

    	version_581: INTEGER_32 is 327761
    			-- version_581 (Comctl32.dll)<=> Microsoft Windows 2000
    			-- (from WEL_WINDOWS_VERSION)

    	version_600: INTEGER_32 is 393216
    			-- version_600 (Comctl32.dll)<=> Microsoft Windows XP
    			-- (from WEL_WINDOWS_VERSION)

    feature -- Windows Versions (output)

    	version_number_string: STRING_8
    			-- String representing the version number using the following format
    			--   <major_version>.<minor_version>.<build_number> for Windows NT, 2000, XP
    			--   <major_version>.<minor_version> for Windows 95, 98, Me
    			-- (from WEL_WINDOWS_VERSION)

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

    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 WEL_LIST_VIEW