Ho, not what I meant, sorry.

I already have this information, what I need is to make sure the password supplied by the user fits with its logon;

Let's suppose you're an admin doing debugging on a client machine; you're still logged in with clientname (for debugging purposes) but you need to access this webpage using YOUR Logon & pass. I want to make sure they are ok so i can enter w/o causing any security probs.

So Your login/Pass (supplied via ASP) <> NT logon at start BUT still a Valid NT logon.

Am I explicit enough ?
(P.S. Sorry for bad english, if that's the case, doin my best here)