在MFC下以多文档视图形式编写的简单绘图程序，可以实现直线、圆、椭圆、曲线、矩形等的简单绘制，并可以选择线型和颜色。-Simple drawing program, can be written in the form of multi-document view in MFC simple draw straight lines, circles, ellipses, curves, rectangles, and can choose the line type and color.