<DllImportAttribute("advapi32.dll")>
<PreserveSigAttribute()>
Public Shared Function LogonUser( _
   ByVal lpszUsername As String, _
   ByVal lpszDomain As String, _
   ByVal lpszPassword As String, _
   ByVal dwLogonType As Integer, _
   ByVal dwLogonProvider As Integer, _
   ByRef phToken As IntPtr _
) As Boolean

[DllImportAttribute("advapi32.dll")]
[PreserveSigAttribute()]
public static bool LogonUser( 
   string lpszUsername,
   string lpszDomain,
   string lpszPassword,
   int dwLogonType,
   int dwLogonProvider,
   ref IntPtr phToken
)