ntlm+LsaLogonUser

[Hamid Choupani]

Dear sir,

I'm developing a firewall that authenticate users with ntlm against Active
Directory.
My ntlm secnario is complete and work truly but my LsaLogonUser has problem.
When I pass NTLM Challenge,User Name,Lan  Manager Response, NTLM
Response,WorkStation Name to  MSV1_0_LM20_LOGON structure and pass it to
LsaLogonUser
function, LsaLogonUser return error,
Doy you have a sample or code that can help me.
PLS Help that is force and important for me.

A big thanks in advance.