I have no idea.
I think you should focus on getting advice about installing VB6 in Windows 11.
If nothing turns up in internet searches or forum searches then start a new thread asking for help with that task.
Install VB6 in Windows 11 - DuckDuckGo
Install VB6 in Windows 11 - ElevenForum
Your thread title could be something like
Installing VB6 in Windows 11 generates .ocx registration error
and do include
- the diagram in your post #2 above
- a link back to this thread in case anybody wants to see the history of your quest.
And do post a link here to your new thread here so anybody coming here can jump across and post in your new thread if they can help you.
Denis