该程序可以获取CAD文件中图形实体的面积，并将其面积添加到DWG文件中。-The program can access CAD graphics file the size of entities, and their area added to the DWG file.

该程序主要功能是在VC实现基本图形的绘制，包括直线，弧形，矩形，椭圆等，并可以讲图形数据保存到文件中，同时还可以计算图形的面积等-The main function of the program is implemented in VC basic graphics rendering, including straight line, arc, rectangle, ellipse, and can speak graphical data saved to a file, also can