My recollection is that the migration tool was really just a tool that would fill your VB6 code with comments telling you that you had to rewrite stuff. Trouble spots were largely related to error handling On Error Goto and error handling blocks had to be refactored into proper Try...Catch blocks, which affected a lot of code, and another trouble spot was all File I/O had to be rewritten/redone, same with any drawing code; Resource files had to be recreated, etc; I don't even think it could load the FRX files but I might be misremembering. I felt it simply wasn't worth even bothering to try to directly convert to VB.NET, and since those programs I wanted to move forward I had to pretty much rewrite anyway, I decided to use C# instead and just make new versions.