autocad 二次开发的xdata开发函数的实例，很好用，朋友送我的啦。-secondary development of xdata development function examples of useful, a friend sent me a few million.

用vc结合objectarx对autocad二次开发，输入cad命令生产圆和直线，并能让图形实现镜像，偏置。,Vc ObjectARX combination with the secondary development of autocad, cad command input circular and straight-line production, and graphics can achieve mirroring, bias.