Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

{ 
  Make your application like a game. Full Screen. 
  Disable all of the system keys. 
}

 procedure TForm1.FormCreate(Sender: TObject);
 var
   HTaskbar: HWND;
   OldVal: LongInt;
 begin
   try
     // Find handle of TASKBAR 
    HTaskBar := FindWindow('Shell_TrayWnd', nil);
     // Turn SYSTEM KEYS off, Only Win 95/98/ME 
    SystemParametersInfo(97, Word(True), @OldVal, 0);
     // Disable the taskbar 
    EnableWindow(HTaskBar, False);
     // Hide the taskbar 
    ShowWindow(HTaskbar, SW_HIDE);
   finally
     with Form1 do
      begin
       BorderStyle := bsNone;
       FormStyle   := fsStayOnTop;
       Left        := 0;
       Top         := 0;
       Height      := Screen.Height;
       Width       := Screen.Width;
     end;
   end
 end;

 procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
 var
   HTaskbar: HWND;
   OldVal: LongInt;
 begin
   //Find handle of TASKBAR 
  HTaskBar := FindWindow('Shell_TrayWnd', nil);
   //Turn SYSTEM KEYS Back ON, Only Win 95/98/ME 
  SystemParametersInfo(97, Word(False), @OldVal, 0);
   //Enable the taskbar 
  EnableWindow(HTaskBar, True);
   //Show the taskbar 
  ShowWindow(HTaskbar, SW_SHOW);
 end;


 { 
  Hope you like it ! 
  So if you have any problem using these codes 
  please e-mail me at : 
  babak_sateli@yahoo.com 
  Babak Sateli 
  www.cdcenterco.com 
}