>Actually, I know the username, what I want to do is have the user log into my system using his/her NT logon name. For security purposes, I need a password so I was thinking of just verifying against the NT password to allow system access. This way, the user doesn't have to maintain multiple passwords. Maybe there are some libraries for purchase that might provide this type of functionality. I know there are for the Novell server.

At least at my agency, that would violate security priciples...the NT password should be kept private from any other apps. This does mean multiple passwords, and the tendency for users to write them all down in a convenient location, unfortunately (you can see them on paper taped near the machine sometimes :)...though the easiest way for users is just to use the same one for every function, so at least they can remember it that way...