It's a VB6 application of our own description. I have not had a chance to hack the source code to see where it comes into play, but probably something to do with a third party DLL we use for remote database connectivity.
There's a significant number of Var* routines not implemented. I implemented the missing ones for a VB6 app I had written, but each app executes different ones, so there's still quite a few missing. If you try the patch already submitted, see if you get further and potentially hit other missing functions. Most of the missing fn's are not too bad to implement, so keep reporting them
Jason