Paul,
I think Ed Rauh has a KB article here telling what has to be installed, it's some level of IE.
>I'm trying to use the Shell's COM interface with
>
>o = CREATEOBJECT( "Shell.Application" )
>
>This bombs on my PC with a "class definition not found" error. I'm using NT 4 Workstation, is it possible this doesn't work under this OS or have I not got something installed that I should have.