HOTKEY FOR MY APPLICATION

Other possibility is to set ShortCut property for MenuItem or Action if You are using Menus or AcionList

  private
    { Private declarations }
    Procedure WMHotkey( Var msg: TWMHotkey ); message WM_HOTKEY;



Procedure TForm1.WMHotkey( Var msg: TWMHotkey );
begin
 if msg.hotkey = 1 Then
 begin
  //Start Game
  ShowMessage('Start Game');
 end;
 if msg.hotkey = 2 Then
 begin
  //End Game
  ShowMessage('End Game');
 end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
 If not RegisterHotkey( Form1.Handle, 1, MOD_ALT or MOD_SHIFT, VK_F9 ) Then
    ShowMessage('Unable to assign F9 as hotkey.');
If not RegisterHotkey( Form1.Handle, 2, MOD_ALT or MOD_SHIFT, VK_F10 ) Then
    ShowMessage('Unable to assign F10 as hotkey.');
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  UnRegisterHotkey( Form1.Handle, 1 );
  UnRegisterHotkey( Form1.Handle, 2 );
end;

SHane

You can also use Form's onShortCut event.

procedure TForm1.FormShortCut(var Msg: TWMKey; var Handled: Boolean);
begin
case msg.CharCode of
  120 : begin { F9 pressed }; Handled := true; end;
  121 : begin { F10 pressed }; Handled := true; end;
end;
end;

I tray to applay Shane code but I get this error messge:-

[Error] Unit1.pas(111): Undeclared identifier: 'TWMHotkey'

which unit shoud i use?