Programming Tips - How can I get the device context (DC) of the desktop?

Date: 2009feb20 Platform: win32 Q. How can I get the device context (DC) of the desktop? A. This does it:
inline HDC GetDesktopDC() { return GetWindowDC(GetDesktopWindow()); }
Its handy if you want want to draw on the desktop or if have window-less application (or DLL) that requires a valid DC for something.