>I am using VFP 7. I'm not sure how to specify the interface, but I tried oUser = GetObject("WinNT://Nordam/sketchum,user","IADsUser") and got an error. If I don't specify the second parameter (which is what I was doing before), it works fine (except that I can't get to the properties I need).

You need to take a look at GetInterface(), which allows you to get an early binding interface from a COM object. However, it's not necessary in this case. Just use GetObject() as in the example I posted. But, as Larry pointed out, the provider appears to not support what you're wanting to do. You might want to try going through the LDAP provider.