make taskbar vanish using C

Now am going to tell u my favourite trick.This trick hides the taskbar .It doesnot appear even u hover mouse over that place.
When i was playing games in my degree college i used to play this trick to protect me from my mentors.

#include
#include

int main()

{
    HWND d;
       while(1)
    {
            sleep(20);
            d=FindWindow("Shell_TrayWnd","");//It passes  taskbar to d.
            ShowWindow(d,SW_HIDE);//Removes the window
}

}

TO restore the taskbar  replace SW_HIDE  with SW_RESTORE (restores the window)