Type Entry: Reactor Object
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Type Entry: Reactor Object
Name
Reactor Object
Class
Runtime class / Visual LISP extension object
Description
Object representing a registered event source and its associated callback set.
Valid Operations
- construction by
vlr-*reactorconstructor functions - enabling and disabling with
vlr-addandvlr-remove - interrogation via
vlr-type,vlr-data,vlr-reactions, and related accessors - persistence-related operations in implementations that expose persistent reactors
Compatibility
Part of the Visual LISP extension layer and available only on Windows in Autodesk's platform model.
Notes
- Autodesk distinguishes transient reactors and persistent reactors.
- Autodesk documents transient reactors as not surviving drawing closure.
- Autodesk documents persistent reactors as being stored with the drawing.
Availability
- AutoCAD 2026: documented (per Autodesk reference page).
- BricsCAD V26: presumed compatible (no contradicting page found).
- Status: AutoCAD documented; BricsCAD presumed-both pending Phase 4 verification.
Source Notes
- [Reactor Functions Reference (AutoLISP/ActiveX)](https://help.autodesk.com/cloudhelp/2026/ENU/AutoCAD-LT-AutoLISP-Reference/files/GUID-B83B512E-CEF6-43C5-9099-398999E254AF.htm)
- [About Transient and Persistent Reactors (AutoLISP/ActiveX)](https://help.autodesk.com/cloudhelp/2024/ESP/AutoCAD-AutoLISP/files/GUID-0A632CD0-99B8-4E7E-A958-A0723E50ABB5.htm)
- Status: documented.