利用VB编写的AUTOcad基础源码，可以画直线，画圆弧，选择线条，删除线条等基本功能-Written in VB AUTOcad the basis of source, you can draw a straight line, draw an arc, select lines, delete lines, and other basic functions

用于将圆弧或样条曲线转化为多段线，Auto CAD VBA-Arc or spline curve is used to translate into polylines, Auto CAD VBA