The PaintDesktop function fills the clipping region in the specified device context with the desktop pattern or wallpaper. The function is provided primarily for shell desktops.
BOOL WINAPI PaintDesktop(
| HDC hdc | |
| ); | 
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.