如果一个webservice是需要window 系统认证 ，怎么调用？

Question

如果一个webservice是需要window 系统认证 ，怎么调用？  

Answer 1

            Dim tsnc As System.Net.NetworkCredential = New System.Net.NetworkCredential(<user>, <pwd>)

            Dim tscc As System.Net.CredentialCache = New System.Net.CredentialCache()

            tscc.Add(New Uri(clsTWS.Url), "Basic", tsnc)

            clsTWS.PreAuthenticate = True

            clsTWS.Credentials = tsnc