The ActiveX objects listed in our documentation are for the ones provided natively by Objectif Lune. There are hundreds - if not thousands - more available for all kinds of other applications, but it is up to the manufacturers of those ActiveX objects to document them.
The “Scripting.FileSystemObject” ActivX object that’s used in the thread you mentioned is a Windows-based ActiveX. Google for it and the first link you should get is Microsoft’s documentation for that object.