Firstly, the whole process of second develop of UG is studied, including: application program interface of UG based on VC++6.0, customization of MenuScript, studying 3D modeling application using UG/OPEN API.

• 首先；对UG二次开发的进行了详细的研究；包括:基于VC++6.；0开发平台的UG应用程序接口、主菜单MenuScript、UG/OPEN API程序三维参数化造型应用研究及装配应用等;