Dim MeinRequest as HttpWebRequest
MeinRequest = DirectCast(WebRequest.Create("bla bla bla")
 
Dim Wp As New WebProxy(MeinProxy, MeinPort)
Dim WpCredentials As New NetworkCredential With {
   .UserName = MeinProxyUserName,
   .Password = MeinProxyPassword
   }
Wp.Credentials = WpCredentials
MeinRequest.Proxy = WP
 
... 
...