I wouldn't hold my breath. The original VB6 was chock-full of COM+ and lots of Windows specific stuff. I would rather attempt to migrate VB6 projects to Gambas (http://gambas.sourceforge.net/en/main.html) which is a modern FOSS take on (Visual) Basic. It's well maintained and runs pretty much everywhere.

Last time i checked Gambas it was completely different from what VB6 was with the only similar things being having a vaguely BASIC-ish language and a form designer. If someone had a VB6 project that wanted to move it away from VB6 and didn't mind making a ton of changes to it, they'd most likely already be on VB.NET many years ago.

If you want a x-platform VB like RAD take a look at XOJO.

That brings back memories. I got a copy of that when it was called REALbasic and distributed on MacFormat magazine cover CDs.

Sufficiently compatible with VB that I wrote some coursework on it for a teacher who only knew VB.

It looks like Xojo is based on REALbasic as http://www.realsoftware.com/ redirects to https://www.xojo.com/.

Yeah they renamed it maybe 10 years ago (it’s pronounced Zo Joe). It’s a fast compiled BASIC like OOP language that runs natively on x86 and ARM.

I’ve been a happy user of Xojo (formally RealBasic) for about 20 years. It’s really powerful and free to use when getting started. I really like the all-in-one IDE and the ability to cross compile for macOS, Windows and Linux. Their desktop support is pretty good. Their iOS and web support not such much however. I think it’s a shame they are not more well known