/////////////////////////////////////////////////////////////////////////////////////////
//// class CWnd ////////////////
protected:
// for processing Windows messages
virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
virtual BOOL OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult);
// for handling default processing
LRESULT Default();
virtual LRESULT DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam);
在CWnd下找虚函数,就可以解决很多问题