winapiuser-interfacecoordinatesgetclientrect

How to get the full client rect?

The GetClientRect function, according to MSDN, is actually only good for determining the client width & height, since left & top are always zero. Is there a way to get the complete client coordinates, including left & top (either in screen space, or in window space)?

Solution

  • Call ClientToScreen on the top left and bottom right of the returned RECT. If you're using MFC, CWnd has a helper overload of CWnd::ClientToScreen that will do this transparently for you.