Performs actions when the handle for the parent control is freed.
Source position: controls.pp line 2394
protected procedure TGraphicControl.DoOnParentHandleDestruction; override; |
DoOnParentHandleDestruction is overridden in TGraphicControl to re-implement the method in the ancestor class. It ensures that Handle for the Canvas is freed when the parent handler is destroyed.
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A clipped window into the parent Canvas. |
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Frees the Handle for the control canvas, and its device context when assigned. |
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Performs actions needed when the handle for the parent control is freed. |
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