Help requested to solve crash problem

Hello!

Since years I am facing the problem that during backup Windows reports that a file is locked.
Most often it occurs with Visual Studio files.
It causes an error that I need to inspect to see if it is serious or not.

Also I often use an app named LockHunter, but I don't like using closed source software.

While I was searching information on how to implement my own "LockHunter" and also to be able to copy a locked file, I found a code on a website that seems to provide some information about how to do that and even provided some VB6 source code for a start. Using archive.org, I was able to get the accompanying VB6 files.
I tried to enhance it with comments and to implement a functionality that would allow to copy a locked file.

However, I experience a crash, and my knowledge about this is still too limited to see what exactely I am doing wrong.

I have attached the project.

Thank you very much for any help.

Sorry to ask, but would be anybody experienced enough with these APIs to make it work?

Well using runtime dependent functions and non-typelib API calls in multithreading is pretty much guaranteed to crash, for starters. Need something like The trick's modMultithreading2.bas ..Not even sure why you'd start a new thread there then just wait on it.