I am writing a smart client application that will be used both within my
company as well as outside of my company.  For the users within my company I
want to be able to authenticate users by using their Windows accounts, but
for users outside my company I will have no option but to use
Username/Password combinations to authenticate them.

What I want to know is how can I reference each type of user in a SQL
database in such a way that I can either accept their Windows account as a
login or prompt them for a username/password combination should the specific
Windows account not be known.

Thanks,
Wells