>I've heard nothing from you that would make him think otherwise.

But I am not advising him am I?

Bob, you are clearly a creditable VFP developer - no question about that. But some of the things you have said about technologies that you are patently unfamiliar with have been, with the greatest of respect, naive.

Therefore, when he asks you to investigate the business case for changing to .NET (or, at least away from VFP), you are simply not qualified to make that case. The responsible thing to have done would have been to own up that you cannot make the case for .NET and recommend that he bring someone in like Kevin Goff as a consultant who understands both technologies and get him to give an honest and impartial appraisal of the situation (given that it could easily be argued that you have a vested interest in the site remaining VFP).