Site made by Autodesk member that contain information to ObjectARX API development and code samples.

An association of CAD customers and vendors committed to promoting Autodesk's AutoCAD DWG drawing file format as an open, industry-standard format for the exchange of CAD drawings.

A free software module that makes it possible to extend AutoCAD with the Python programming language, in a similar way as with AutoLISP.

Talk about programming using .NET framework and ObjectARX Autodesk API.

A non-profit association of software developers who are working on applications around AutoCAD.

A learning resource for AutoCAD Programming and Customization. AutoCAD.Net programming with C#, VBA Programming, DIESEL Macros and AutoCAD Tips and Tricks.

Information about undocumented features of AutoCAD, such as commands, system variables, and functions of the ADS, ARX, and AutoLISP programming interfaces.