Dim sResponse As String = ""
        Dim webReq As HttpWebRequest = Nothing
        Dim webResp As HttpWebResponse = Nothing
        Dim reqStream As Stream = Nothing

        ' GetPostUrl return the URL only without any parameter.
        webReq = DirectCast(WebRequest.Create(ub.GetPostUrl()), HttpWebRequest)

        ' GetQueryString return the data for the post (param1=value1&param2=value2...)
        Dim bytes As Byte() = Encoding.UTF8.GetBytes(ub.GetQueryString())
        webReq.Method = "POST"
        webReq.ContentType = "application/x-www-form-urlencoded"
        webReq.ContentLength = bytes.Length
        reqStream = webReq.GetRequestStream()
        reqStream.Write(bytes, 0, bytes.Length)
        reqStream.Close()

        Try
            webResp = DirectCast(webReq.GetResponse(), HttpWebResponse)

            If webResp.StatusCode = HttpStatusCode.OK Then
                Dim loResponseStream = New StreamReader(webResp.GetResponseStream(), Encoding.UTF8)
                sResponse = loResponseStream.ReadToEnd()
            End If

            webResp.Close()
        Catch ex As Exception
            WriteErrorInFile(ex)
        End Try