ObjectARX

The ObjectARX environment has object-oriented C++ programming interfaces for customization and extension of AutoCAD. Get the most out of AutoCAD open architecture with the ObjectARX libraries for direct access to the database structures, graphics system, and native command definition to develop efficient and compact CAD applications.

The application developed by ARX cant run on progeCAD directly. progeCAD provide ICARX application interface, which is compatible with ARX, that allows you to run it.
Please refer to Software Developer Kit for detail.

Click here to download the Software Development Kit with all the related documentation (SDK)