HIDE FROM TASK BAR

procedure TForm1.FormCreate(Sender: TObject);
begin
ShowWindow(Application.Handle, SW_HIDE);

SetWindowLong(Application.Handle, GWL_EXSTYLE,
GetWindowLong(Application.Handle, GWL_EXSTYLE) or WS_EX_TOOLWINDOW);

ShowWindow(Application.Handle, SW_SHOW);
end;