本文对CAD技术中的二次开发所需的语言及工具介绍归纳，得出了一些有用的结论，对于了解CAD二次开发技术的发展及其如何适应具有一定的意义-This article introduces the language required by the secondary development of CAD technology and tools are summarized , and draw some useful conclusions , and how to adapt has a certain significance for understanding the development of the secondary development of CAD technology and its