slojuggler I did quite a bit of research on this recently so you may find something useful from Windows Version Detection. The best method would be to expand on Re: Re: Re: Re: Windows Version Detection by filling out the rest of the chart and put some additional logic as well. I stopped once I had arrived at what I needed but it looks like you need more.

--Jim

Update: It seems I got much of the info piecing together web searches for getosversion and VB snippets from MSDN developer pages. HTH.