WindowProc WndProc

LRESULT CALLBACK WindowProc(          HWND hwnd,
    UINT uMsg,
    WPARAM wParam,
    LPARAM lParam
);

 

 ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/winui/winui/windowsuserinterface/windowing/windowprocedures/windowprocedurereference/windowprocedurefunctions/windowproc.htm