title: How to send WebRequest via proxy?
body: <p>How does the following code need to be modified to send the <code>WebRequest</code> via a specified <code>proxy server</code> and <code>port number</code>?    </p>
  
  <pre><code>Dim Request As HttpWebRequest = WebRequest.Create(url)
  Request.Method = "POST"
  Request.ContentType = "application/x-www-form-urlencoded"
  Using writer As StreamWriter = New StreamWriter(Request.GetRequestStream())
      writer.Write(params)
  End Using
  </code></pre>