Как узнать о нажатии NON-MENU клавиши в момент когда меню показано

Code:

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Classes, Graphics, Controls,

Forms, Dialogs, Menus;

type

TForm1 = class(TForm)

   MainMenu1: TMainMenu;

   One1: TMenuItem;

   Two1: TMenuItem;

   THree1: TMenuItem;

private

   {Private declarations}

   procedure WmMenuChar(var m : TMessage); message WM_MENUCHAR;

public

{Public declarations}

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;

end.