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TCustomActionPopupMenu.VisibleChanging Method
TCustomActionPopupMenu Class | TCustomActionPopupMenu Members | ActnMenus Namespace | Description | See Also
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Provides the interface for a method that responds to changes in the control's visibility.

Pascal
procedure VisibleChanging; override;
C++
virtual __fastcall VisibleChanging();
Description

VisibleChanging is called before the value of a control's Visible property changes. As implemented in TControl, it does nothing. Override VisibleChanging to respond to changes in the control's visibility. For example, if a control should not change its visibility, override VisibleChanging to raise an exception when an attempt is made to alter the control's visibility. 

 

See Also
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