We have been having the debate for the past 2 years about rewriting our applications in VB.Net and we still don't have a great answer for it. Effectively we can spend a year rewriting and testing our applications to give us....the same product as we have now but it is in .Net. There is no business case for this at all. The time spent on rewriting something that already exists would be better spent on enhancing what we have using VB6 as this generates sales.

We will be moving across to .Net but only when our application needs a major change, and that major change will in all probability be driven by sales, not by a need to move up to the latest programming language.