Here are the Windows Script Host / ActiveScript Reference Manuals

[lxp]

This is probably all you need to read/know:

How much of Directory Opus uses ActiveX?

There's no use of ActiveX at all in that sense. Nothing in Opus other than the viewer (optionally) uses ActiveX. ActiveX is just a standard for hosting another program's window inside your own. The problem with it was never the part of it that we us…