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...early trap then Close Window procedure?
Autor: Panthero - Michael
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Tip Rating (8):  
     


Procedure TForm1.HandleMessage(var Msg:TMessage);
begin
 if 
msg.msg = WM_CLOSE //You can insert there other message constans from windows unit.
 
then
  begin
   
{Your code when user clicked close button}
   
showmessage('You can not close this window!');
  end
 else 
form1.wndproc(msg); //if not closed system handle the message default
end;
procedure TForm1.Create(Sender:Tobject);
begin
 
form1.Windowproc:=form1.handlemessage; //run handling
end;


 

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