I wrote a program use the pure sdk, but when I build the project, vc++ says, "warning C4013: 'SetDCBrushColor' undefined; assuming extern returning int", and when linked, there meets an "unresolved external symbol _SetDCBrushColor". I have checked the msdn, it says this funcion declare in wingdi.h, include windows.h, and link with gdi32.lib, all this files and included and the lib path is there(you know, just the default), what's the problem, so strange!