绘制LoadOEMBitmap中参数所带表的位图，充分理解什么是预定义的window位图（见OnDraw函数）

VC++中图像处理类CBitmap的用法 class CBitmap : public CGdiObject { DECLARE_DYNAMIC(CBitmap) public: static CBitmap* PASCAL FromHandle(HBITMAP hBitmap); // Constructors CBitmap(); BOOL LoadBitmap(LPCTSTR lpszResourceName); BOOL LoadBitmap(UINT nIDRes