关于DWG文件格式，OpenCAD给出了一个格式说明。我在网络上下了个C++源代码，不是英文的，是世界语写的。

我试图翻译成C#版本后，发现只解析了的部分DWG的数据。与OpenCAD给出的格式说明进行参照，我将与大家共享我的研究过程。同时也希望得到有这方面成果的高手的指导。对于有兴趣的朋友，也欢迎交流。

这里附上网络上下的C++源代码，有兴趣的朋友下了一起研究。

-About DWG file format, OpenCAD given a format. I had a network up and down the C++ source code, not in English, is written in Esperanto. I tried to translate into C# version, we found only a part of the analysis of DWG data. And OpenCAD instructions given in reference format, I will share my research process. Also hope to get the results in this respect the guidance of a master. For friends who are interested are also welcome exchange. Here attached the network up and down the C++ source code, interested friends together under study.