When I use this to post some data, the application doesn't recognize it as a postback:

            Dim loWebRequest As System.Net.HttpWebRequest

            ' Prepare Web request
            loWebRequest = System.Net.WebRequest.Create(cLoginUrl)
            loWebRequest.Method = "POST"
            loWebRequest.ContentType = "application/x-www-form-urlencoded"
            loWebRequest.ContentLength = lcPostData.Length

            ' Send the data
            loStreamWebRequest = loWebRequest.GetRequestStream()
            loStreamWebRequest.Write(loByte, 0, loByte.Length)
            loStreamWebRequest.Close()

Is there any way to have the System.Net.HttpWebRequest to send the data so the application would recognize it as a postback?