How to authenticate against Active Directory with WinNT:// provider?

Hi, I got the following code from microsoft website to authenticate against AD but this code only valid with LDAP and not with WinNT:// because it uses DirectorySearcher which is not supported by WinNT://
How can I modify it to autheiticate agains AD with WinNT:// ?
Public Function IsAuthenticated(ByVal domain As String, ByVal username As String, ByVal pwd As String) As Boolean
            Dim domainAndUsername As String = domain & "\" & username
            Dim entry As DirectoryEntry = New DirectoryEntry(_path, domainAndUsername, pwd)
                'Bind to the native AdsObject to force authentication.			
                Dim obj As Object = entry.NativeObject
                Dim search As DirectorySearcher = New DirectorySearcher(entry)
                search.Filter = "(SAMAccountName=" & username & ")"
                Dim result As SearchResult = search.FindOne()
                If (result Is Nothing) Then
                    Return False
                End If
                'Update the new path to the user in the directory.
                _path = result.Path
                _filterAttribute = CType(result.Properties("cn")(0), String)
            Catch ex As Exception
                Throw New Exception("Error authenticating user. " & ex.Message)
            End Try
            Return True
        End Function

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qf3l3kConnect With a Mentor Commented:
Maybe this piece of code will work for you then:

On Error Resume Next

Set dso = GetObject("WinNT:")
Set lobjUser = dso.OpenDSObject("WinNT://DOMAIN", "DOMAIN\username", "abc123", 1)

WScript.Echo Err.Number

If Err.Number = 0 Then
      AuthenticateUser = 0
      WScript.Echo "Authenticated"

      AuthenticateUser = 1 'not authenticated
      WScript.Echo "Not Authenticated"
End If

Hope that will be a bit of a help?
Not sure if this is what you are looking for:

Set objComputer = GetObject("WinNT://MyDomain/TestComputer,computer")
Set objGroup = GetObject("WinNT://MyComputer/TestGroup,group")
Set objUser = GetObject("WinNT://MyDC/MyDomain/JohnDoe,user")

Above 3 examples how to bind different type of object.

Is that method you looking for or you have more specific need?
Abdu_AllahAuthor Commented:
>Is that method you looking for or you have more specific need?
No that is not what I want , all what I want  is to verify that the user is exist and if so check if the password he provided match the one that is stored in the AD (Authentication process.)
In fact one more thing. I did test it in VBscript, that's why code is minimal.
Abdu_AllahAuthor Commented:
This is a VB 6 not .NET!
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