Windows forms security using logonuser API

[Guest]

Hi,
I am using vb.net application and i want to authenticate users based on
LOGONUSER API. This API is working in XP machines and not working in win 2000
macines.
What might be the problem ?
Any ideas?

Regards,
Bala

 

[Mattias Sjögren]

What might be the problem ?

Like the documentation says, on Win 2000 the process needs the
SE_TCB_NAME ("Act as part of the operating system") privilege for the
function to succeed. That privilege is usually only granted to the
local system account.



Mattias

 

[Herfried K. Wagner [MVP]]

I am using vb.net application and i want to authenticate users based on
LOGONUSER API. This API is working in XP machines and not working in win
2000
macines.
What might be the problem ?

In addition to Mattias' reply: What does your function declaration look
like?

\\\
Private Declare Auto Function LogonUser Lib "advapi.dll" ( _
ByVal lpszUsername As String, _
ByVal lpszDomain As String, _
ByVal lpszPassword As String, _
ByVal dwLogonType As Int32, _
ByVal dwLogonProvider As Int32, _
ByRef phToken As IntPtr _
) As Boolean
///