The AutoCAD Map 3D ActiveX API covers data extension functionality (drawing sets, queries, object data... the "ADE" functionality).

For broader coverage of AutoCAD Map 3D functionality, use the .NET API, which is included in the AutoCAD Map 3D SDK. The SDK is a separate installation from AutoCAD Map 3D itself. You can download it from the Autodesk web site.

Note  The ActiveX API remains available to support legacy applications that use it. For all new development, the .NET API is the best choice.

To download the AutoCAD Map 3D SDK

1. Open the Autodesk Home Page (it opens in a new window) and click Search.
2. Search for "ObjectARX for Autodesk Map 3D".
3. Click "Developer Center - ObjectARX for Autodesk Map 3D".
4. Click "License And Download".