类似画笔的绘图控件 它主要完成的功能有画直线、曲线、圆、椭圆、矩形、多边形；支持剪贴板的操作；支持撤销、重复；保存成位图文件；打开位图文件。这个例子是用MFC开发的，为了方便使用，最后将转换成控件。-similar brush drawings complete control of its main functions painting line, curve, circle, oval, rectangle, polygon; Clipboard support of the operation; To support the revocation, duplication; Preservation into bitmap file; Open bitmap file. This example is the development of the MFC, in order to facilitate the use, the final will be converted into control.