If you were looking for the same code base to work both inside and outside of AutoCAD then the RealDWG approach may work for you since the code is the same - RealDWG doesn't need AutoCAD as a host application. The open Design Alliance libraries are for making stand-alone applications. Both have supported C++ for years & can be considered stable - well, as stable as CAD gets.
One option to consider is to target AutoCAD and Bricscad. Supporting AutoCAD and IntelliCAD requires essentially two versions of code. Bricscad's goal is to be completely compatible with ObjectARX, and in my experience they are pretty close.
This at least simplifies the problem from supporting three instances (your standalone version, AutoCAD, and IntelliCAD) to supporting two instances (your standalone version and AutoCAD/Bricscad).
"DWGdirect is not just a SDK to read and write DWG files. It actually offers a full blown framework that can be used to develop a professional CAD application, complete with plug-in architecture and all." quote source
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查看我对之前几个 AutoCAD 问题的回答
C# 中的开源 cad 绘图 (dwg) 库
可以读取/写入 dxf/dwg 文件的 .Net CAD 组件
如果您正在寻找在 AutoCAD 内部和外部都可以工作的相同代码库，那么 RealDWG 方法可能适合您因为代码是相同的 - RealDWG 不需要 AutoCAD 作为宿主应用程序。 开放式设计联盟库用于制作独立的应用程序。 两者都多年来一直支持 C++ 可以认为是稳定的 - 嗯，与 CAD 一样稳定。
这个博客（http://through-the-interface.typepad.com/）是对于 RealDWG 来说是一个很好的选择
Have a look at my answers to a couple of previous AutoCAD questions
Open source cad drawing (dwg) library in C#
.Net CAD component that can read/write dxf/ dwg files
If you were looking for the same code base to work both inside and outside of AutoCAD then the RealDWG approach may work for you since the code is the same - RealDWG doesn't need AutoCAD as a host application. The open Design Alliance libraries are for making stand-alone applications. Both have supported C++ for years & can be considered stable - well, as stable as CAD gets.
This blog (http://through-the-interface.typepad.com/) is a good one for RealDWG
可以考虑的一种选择是针对 AutoCAD 和 Bricscad。 支持 AutoCAD 和 IntelliCAD 本质上需要两个版本的代码。 Bricscad 的目标是与 ObjectARX 完全兼容，根据我的经验，它们非常接近。
这至少将问题从支持三个实例（您的独立版本、AutoCAD 和 IntelliCAD）简化为支持两个实例（您的独立版本和 AutoCAD/Bricscad）。
One option to consider is to target AutoCAD and Bricscad. Supporting AutoCAD and IntelliCAD requires essentially two versions of code. Bricscad's goal is to be completely compatible with ObjectARX, and in my experience they are pretty close.
This at least simplifies the problem from supporting three instances (your standalone version, AutoCAD, and IntelliCAD) to supporting two instances (your standalone version and AutoCAD/Bricscad).
“DWGdirect 不仅仅是一个用于读取和写入 DWG 文件的 SDK。它实际上提供了一个完整的框架，可用于开发专业的 CAD 应用程序，并配有插件架构等。” 引用来源
"DWGdirect is not just a SDK to read and write DWG files. It actually offers a full blown framework that can be used to develop a professional CAD application, complete with plug-in architecture and all." quote source