{
 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
}