>>Ed,
>>
>>Could GetVersionEx() be of any use here?
>
>Distinguishing between NT versions, no, since the code base is identical, and the extended OSVERSIONINFOEX structure is only implemented in Win2K. Take a look at the MSDN doc for the lpVersionInfo parameter to see what has to be done differently.

I was thinking about the szCSDVersion member of OSVERSIONINFO structure. I hadn't looked at that member yet and thought you might have.