This is a another way to hide your program's title bar:
Override the CreateParams method as shown here:
{ private Deklaration }
procedure CreateParams(var Params : TCreateParams); override;
...
procedure TForm1.CreateParams(var Params : TCreateParams);
begin
inherited Createparams(Params);
with Params do
Style := (Style or WS_POPUP) and not WS_DLGFRAME;
end;