UG 3D软件的Grip编程函数。分析曲面的法向。-Grip UG 3D software programming function. Analysis of surface area.

vba编程手册，提供了各种函数的相关参数和例子-a vba coding reference,in which various functions parameter derections is available,as well as a lot of examples.

ObjectARX函数速查，ObjectARX编程用书，张帆配套用书(ObjectARX function quick check)

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)