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How can I detect if a non menu key has been pressed

Title: How can I detect if a non-menu key has been pressed? Question: How can I detect if a non-menu key has been pressed while a menu is displayed? Answer: Create a message handler for the WM_MENUCHAR character message. type TForm1 = class(TForm) MainMenu1: TMainMenu; One1: TMenuItem; Two1: TMenuItem; THree1: TMenuItem; private procedure WmMenuChar(var m : TMessage); message WM_MENUCHAR; public end; var Form1: TForm1; implementation {$R *.DFM} procedure TForm1.WmMenuChar(var m : TMessage); begin Form1.Caption := 'Non standard menu key pressed'; m.Result := 1; end;