How to Validate users using their pre window 2000(SAM) logon name?

 

In Active Directory, each user account has a user logon name, a pre-Windows 2000 user logon name (security account manager account name SAM), and a UPN suffix(User Principal Name ).
Actually we are validating users using their logon name+ UPN suffix. This can be  done by using membership class
" Membership.ValidateUser(userName, password);"
Can anyone tell me how we can validate users using the pre window 2000(SAM) logon name?? i.e their windows login userbame/Password in our asp.net pages

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