>>>Thomas,
>>>
>>>I think (not sure) under NT it can be also installed with WinNT SP6(a). Do you've that SP applied?
>>>You can see shell32.DLL history and versions at http://support.microsoft.com/default.aspx?scid=http%3a%2f%2fsupport.microsoft.com%2fservicedesks%2ffileversion%2fdllinfo.asp&fp=1
>>
>>Sergey,
>>
>>I've seen instances where checking the registry for the "Shell.Application" object was present in HKEY_CLASSES_ROOT, but the version of shell32.dll didn't support it.
>
>George,
>
>Do you know which shell32.dll version first supported "Shell.Application" object?

Sergey,

Back in July, 2000 I wrote an article on the Shell.Application for vfug. According to that, I recommended checking the registry first for the ProgID, then checking (using AGETFILEVERSION()) to see if the version number was greater or equal to 4.71. So I'd say that's it.