Validate User Credentials on Microsoft WinNT and Win95

Hello!

I need to validate user on remote NT domain.
Does anyone have any suggestion how to do it?

MSDN suggest to use SSPI package, but i really do not understand the logic behind all this. Can anyone explain  this?


anyagAsked:
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jkrConnect With a Mentor Commented:
The link I posted contains code that does exactly what the title of the Q was.
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jkrCommented:
Well, do you want to do that programmatically?
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anyagAuthor Commented:
yes
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jkrCommented:
See http://support.microsoft.com/support/kb/articles/Q180/5/48.ASP ('HOWTO: Validate User Credentials on Microsoft WinNT and Win95')
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anyagAuthor Commented:
I've read that already but i do not understand the whole procedure of client/server handshaking, why being client and server at the same time i can authenticate user this way? and why some for  domains that i succeed and for some not.
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jkrCommented:
>>I've read that already

Have you _tried_ it? If not, why did you reject my answer?
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anyagAuthor Commented:
of cause i've tried it. (i took a title for my question from that article). i took sources from MSDN and fixed them so it will work in multithreaded environment. But i really whould like to understand what acctually going on there. MSDN does not explain, it just say  that it will work for authentication. Well it work sometimes and sometimes it does not, and i cannot find a problem 'cause i do not understand an algorithm or logic behind this piece of code
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