OpenDCL

OpenDCL is for AutoLISP programmers who want to replace AutoCAD’s limited DCL (Dialog Control Language) with a rich set of modern Windows controls and forms. It is free software under the GNU GPL, maintained by the OpenDCL Consortium.

Download

Studio and Runtime installers (stable and current builds).

Get OpenDCL

Help

Online reference for forms, controls, methods, and AutoLISP usage.

Browse help

Localization

Language packs for translators (download or build from current sources).

Get packs

Community

Ask questions on GitHub Discussions. Historic threads are in the searchable forum archive.

Discussions Forum archive

Source code

C++ sources for Studio and multi-CAD runtimes on GitHub.

github.com/opendcl

What you get

OpenDCL Studio — visual dialog editor (installs runtime too)
OpenDCL Runtime — ARX/BRX (and related) modules for end-user deployment
Support across AutoCAD-compatible platforms (see release notes for versions)

This site is the GitHub Pages project home for downloads and help. New conversation: GitHub Discussions. Historic forum threads: www.opendcl.com/forum-archive. Old www.opendcl.com/forum links land on the archive (or Discussions for new posts); the legacy SMF host is decommissioned.