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 WControlWindow         Control window base class
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 WControlWindow
 Control window base class
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 Properties
 Valid          A logical indicating whether the control's state is valid
 WndClass       The name of the control's window class
 
 Methods
 WControlWindow:Create()      Create a window
 WControlWindow:Init()        Construct a window base object
 WControlWindow:OnDestroy()   Pre-destruction of a window
 WControlWindow:OnDrawItem()  Requests to draw an owner-draw item
 WControlWindow:OnInitDialog() Perform run-time initialisation of a control
 WControlWindow:OnLDblClick() Mouse left button double-click
 WControlWindow:OnLBtnDown()  Mouse left button click
 WControlWindow:OnLBtnUp()    Mouse left button release
 WControlWindow:OnMouseMove() Notification of mouse movement
 
 Inherits From
 WWindowBase
 
 Inherited By
 WArrowButton
 WBitmap
 WBitmapFile
 WBListBox
 WButtonBitmap
 WCheckBox
 WComboBox
 WEdit
 WGroupBox
 WListBox
 WProgressBar
 WPushButton
 WRadioButton
 WScrollBar
 WSpinButton
 WTextControl
 WVBXControl
 
 Description
 This class is the abstract base class for control window
 classes.   Controls, also called "child controls", include
 buttons, check boxes, combo boxes, edit controls, etc.
 commonly found in dialogs.  This is an abstract class:
 descendants must provide various properties/methods to be
 usable.  So, using the Init() method, other than in a
 suitable sub-class, will cause an error.
 
 The only property that must be provided by a sub-class is
 WndClass (the name of the window class), although WndStyle
 (the window style) is normally required as well.
 
 Because Clip-4-Win uses "smart dialogs with dumb controls",
 few properties and few methods are required in this class or
 most sub-classes.  (The WDialog class provides the logic,
 rather than spreading it across the controls.)
 
 The OnXXX() methods are mainly "stubs" which return NIL, to
 allow them to be easily defined in a sub-class, should you
 need them.
 
 Example
 
 See Also  (press Enter)