Sites about the process of extending AutoCAD with one of the many programming languages available for that purpose, such as:
  • AutoLISP and VisualLISP
  • C/C++ (through the ADS and ObjectARX APIs)
  • VBA (through ActiveX)
  • a number of other possibilities, like Java, Perl, and Python.
Sites about the process of extending AutoCAD with the help of the AutoLISP programming language, and the VisualLISP development environment (AutoLISP and VisualLISP are often used as synonyms).

VBA

Sites about the process of extending AutoCAD with the help of the VBA (Visual Basic for Applications) programming language through the ActiveX programming interface.