利用MFC进行bezier曲线、曲面的绘制，并能拖曳控制点改变曲线形状，还有升阶的功能，最后利用bezier曲线绘制了符号@-Use MFC bezier curves were plotted surfaces, and can drag the control points to change the shape of the curve, as well as bands or function. Finally, bezier curve drawing the symbol @