Vcl.ComCtrls.TTabChangingEvent
Delphi
TTabChangingEvent = procedure(Sender: TObject; var AllowChange: Boolean) of object;
C++
typedef void __fastcall (__closure *TTabChangingEvent)(System::TObject* Sender, bool &AllowChange);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
type typedef |
public | Vcl.ComCtrls.pas Vcl.ComCtrls.hpp |
Vcl.ComCtrls | Vcl.ComCtrls |
Description
TTabChangingEvent is the type of a tab control's TTabControl.OnChanging and TCustomTabControl.OnChanging event handlers.
Sender is the tab control whose selected tab is changing.
AllowChange returns True if the tab control can change the current tab, False if the event handler blocks the change.