使用AutoCAD进行地形图测绘高级开发的参考书，对于基于LISP二次开发的人员具有重要使用价值。-Topographic mapping using AutoCAD for advanced development of reference books, for the secondary development of LISP-based staff have an important value.

AutoCAD VBA属性.chm AutoCAD里的DXF参考书.chm-AutoCAD VBA AutoCAD DXF

AutoCAD二次开发的参考书，基于ObjectARX的。-AutoCAD second development of reference, based on ObjectARX.