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...prevent Alt+F4?
Autor: Simon Grossenbacher
Homepage: http://www.swissdelphicenter.ch
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Tip Rating (7):  
     


public
  procedure 
AppMessage(var Msg: TMSG; var HAndled: Boolean);
end;

{...}

implementation

{...}

procedure TForm1.FormCreate(Sender: TObject);
begin
  
// set your applications message handler to your new one
  
Application.OnMessage := AppMessage;
end;

procedure TForm1.AppMessage(var Msg: TMSG; var Handled: Boolean);
begin
  
// let your application handle all messages initially
  
Handled := False;
  case Msg.Message of
    
WM_SYSKEYDOWN:
      if Msg.wParam = VK_F4 then
        
Handled := True; // don't allow ALT-F4
  
end;
end;

//Or Write in the OnCloseQuery handler CanClose :=  False
//Oder schreibe im OnCloseQuery Ereignis CanClose := False


 

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