调用CATIA的API进行二次开发，实现三维快速特征造型-for catia api

catia界面开发（二次开发类），包括工具条--工具、图标创建的基本功能。适合初学者使用。-catia interface development (secondary development classes), including the toolbar- tools, the basic functions of the icon to create. Suitable for beginners.

catia 二次开发教程，CAA(Component Application Architecture)C++是CATIA的一整套C++函数库，该函数库在CATIA运行时加载。用户通过安装RADE(Rapid Application Development Environment)模块，用户可以在VC++编程环境下编制程序，与CATIA进行通信。(CATIA secondary development course)