LsaLogonUser Usage.. Please Help...

From: Varadharajan. M.V (varadha_at_samsung.com)
Date: 02/25/05 

Date: Fri, 25 Feb 2005 17:12:02 +0530

Hello All,
 I have done fingerprint authentication and after licensing biologon.dll
from Microsoft everything is fine. when user keeps his finger, iam able to
recognize and take the username and password and pass on to function in
biologon.dll; It takes me to the session of the user.
  But problem comes when I go and remove the check in "User Acccount/ change
the way user log on or off" and uncheck Use welcome screen. When we do that,
the welcome screen is gone, and dialog based logon comes. So now when i use
the biologon.dll function, it fails.
So I tried to use LsaLogonUser in this scenario. It returns error 50; I have
set the TCB prevelege before calling LsaLogonUser function with the
user-name and password. Can anybody tell whether any other functions to be
called before LsaLogonUser function?
Regards,
Varadha.