Autodesk Developer Network

AutoCAD ObjectARX

  • License & Download
    Download and get a license for the ObjectARX CAD engineering programming environment from Autodesk. Read the terms and conditions for use of the ObjectARX programming language.
  • Frequently Asked Questions
    Get answers to questions about ObjectARX, the programming environment that enables developers to use, customize, and extend AutoCAD applications and AutoCAD-based products.
  • ObjectARX System Requirements
    Find the recommended hardware specifications and system requirements for the Autodesk ObjectARX AutoCAD engineering environment in 32-bit and 64-bit software configurations.
  • ObjectARX
    ObjectARX programming environment provides object-oriented programming interfaces for AutoCAD API developers to use, customize, and extend AutoCAD software and CAD applications.