在对话框里显示矢量图形，实际是显示位图，是先把矢量图形转化成位图，然后显示到控件里面。包含了控件，矢量图形，位图多方面知识，是学习MFC学习C++的好例子。-In the dialog box shows vector graphics, actual it is displaying a figure, is first the vector graphics into a bitmap, then show to control it. Contains control, vector gr