    class
    	WEL_SHOW_WINDOW_MESSAGE

    General
    	cluster: wel
    	description: "Information about message Wm_showwindow which is when a window is about to be hidden or shown."
    	create: make

    Ancestors
    	WEL_MESSAGE_INFORMATION
    	WEL_SW_CONSTANTS

    Queries
    	l_param: POINTER
    	message: INTEGER_32
    	parent_closing: BOOLEAN
    	parent_opening: BOOLEAN
    	shown: BOOLEAN
    	status: INTEGER_32
    	w_param: POINTER
    	window: WEL_WINDOW

    Commands
    	make (a_window: WEL_WINDOW; a_message: INTEGER_32; a_w_param, a_l_param: POINTER)