> For the complete documentation index, see [llms.txt](https://chaoses-ib.gitbook.io/directory-opus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chaoses-ib.gitbook.io/directory-opus/manual/reference/scripting_reference.md).

# Scripting Reference

The Directory Opus scripting interface is built around ActiveX. The advantage of this is that Opus scripting is *language neutral* - you can use any ActiveX scripting language you have installed on your machine. Windows ships with **VBScript** and **JScript** interpreters, and you can add additional languages from third-party providers (e.g. Perlscript, Python, etc).

The scripting interface is presented as a number of *Objects* and *Events*.

* [*Objects*](/directory-opus/manual/reference/scripting_reference/scripting_objects.md) are created by a script, or provided to a script by Opus, and have defined methods and properties that allow you to interact with Opus.
* [*Events*](/directory-opus/manual/reference/scripting_reference/scripting_events.md) are functions provided by a script, that Opus will invoke under certain conditions. For example, the *OnBeforeFolderChange* event is fired before the folder is changed in a Lister.