About Querying Reactors (AutoLISP/ActiveX)

You can get information about a reactor that you created or those that have been created with other applications.

Note: ActiveX support in AutoLISP is limited to Windows only.

You can use the following functions to inspect a reactor object:

• vlr-data-set - Returns the type of the specified reactor. For example:

  (vlr-type circleReactor)
  :VLR-Object-Reactor

• vlr-current-reaction-name - Returns the name of the event that caused the callback function to be called. For example:

  (vlr-current-reaction-name)
  :VLR-modified

• vlr-data - Returns the application-specific data value attached to the reactor. For example:

  (vlr-data circleReactor)
  "Circle Reactor"

  You can use this data to distinguish among multiple reactors that can fire the same callback function.

• vlr-owners - Returns a list of the objects in an AutoCAD drawing that fire notifications to an object reactor. For example, the following function call lists the objects that fire notifications to circleReactor:

  (vlr-owners circleReactor)
  (#<VLA-OBJECT IAcadCircle 03ad077c>)

• vlr-reactions - Returns the callback list of condition-function pairs of the specified reactor. The following example returns information about circleReactor:

  (vlr-reactions circleReactor)
  ((:vlr-modified . PRINT-RADIUS))

Tip: On AutoCAD for Windows only, you can use the Inspect tool in the Visual LISP IDE to view information about reactor objects.