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.