这是一款可用于VB、VC++的CAD绘图OCX控件，文件不大，却具备通用平面CAD功能，方便的处理各种矢量图形，并提供交换文件及二次开发接口。适用于CAD/GIS等图形相关的软件开发。-This is a can be used for VB, VC++ CAD OCX drawing control, file is small, but with the general plane CAD function, convenient to deal with all kinds of vect