The solution is what is outlined on post #118 in the second part, from the line "If it didn't work, then:"

Anyway I still don't know if that "SSTabEX - SSTab Replacement" that is listed on your Components dialog is one that you compiled yourself or the one that can be downloaded from GitHub.

If you want, send me privately that ocx that is registered in your Windows (ensure that you are sending the correct one file), the *.vbp file of the non-working project, and the form(s) file(s) that use the SSTabEx control, and I'll modify them for you.