Hey thanks,
but the code does not work really
this will hide the taskbar on runtime
if i minimize the window
i see no taskbar and i can not maximize the window again

so i must close the programm by the task manager
i asume the code should look like this
h=FindWindow("Shell_TrayWnd","");
ShowWindow(h,SW_SHOW); <-- SW_SHOW not hide
on_exit = exit_event;
but there is no taskbar visible in my game