Comments by KenLevin (Top 1 by date)

that is the point of my earlier post. If you make the one line change (change .hbrBackground) in wndclassex the window color is changed until you decide to add a handler for wm_erasebkgnd, then the one line change breaks IF the message handler (wndproc) isn't setup correctly. I pointed out that the default code created by code::blocks needed a simple adjustment to preserve the custom back color if a wm_erasebkgnd message handler is used.