cad开发工具包cadlib，有利于cad图形的开发学习，不必从底层做起-cad development kit cadlib, conducive to the development of learning cad graphics without having to start from the bottom

cadlib4.0破解版，直接调用dll，不需要安装(cadlib4.0 crack,Direct call to DLL, no need to install)

java调用c#的autocad签名，c++部分(Java calls the AutoCAD signature of the c#, the c++ part)