选择CAD实体，将实体的点位信息输出到一个文本文件中。对于刚接触ObjectARX编程的童鞋还是很有用的，可以清楚的了解CAD中部分类型实体的数据结构。VS2005+ObjectARX2007，个人编写。-Select CAD entities and write entities pts to a text file.It is helpful for those learn ObjectARX and C++.You can learn something about ARX Entiti

Autolisp数据类型，用于初学者深入学习Autolisp语言，并进行开发。(Autolisp data types, for beginners to learn Autolisp language, and development.)

Autolisp语言数据变量类型，适合初学者快速学习Autolisp语言。(Autolisp language data variable type, suitable for beginners to quickly learn Autolisp language.)