Загрузка файла в фалохранилище

Winsock1.Protocol = sckTCPProtocol
Winsock1.Connect "имя_сервера", 80
While Not Winsock1.State = 7
DoEvents
Wend

Parametrs="параметр1=значение&параметр2=значение"
Winsock1.SendData "POST /адрес_скрипта HTTP/1.1" & vbCrLf
Winsock1.SendData "Content-Type: application/x-www-form-urlencoded" & vbCrLf
Winsock1.SendData "Host: имя_сервера" & vbCrLf
Winsock1.SendData "Content-Length: " & len(Parametrs) & vbCrLf & vbCrLf
Winsock1.SendData Parametrs & vbCrLf

------------8c947961191233a
Content-Disposition: form-data; name="sfile"; filename="win.txt"
------------8c947961191233a
Content-Disposition: form-data; name="maxFileSize"

30720
------------8c947961191233a
Content-Disposition: form-data; name="agree"

1
------------8c947961191233a
Content-Disposition: form-data; name="x"

67
------------8c947961191233a
Content-Disposition: form-data; name="y"

10
------------8c947961191233a
Content-Disposition: form-data; name="action"

storeFile
------------8c947961191233

-----------------------------3219265987165
Content-Disposition: form-data; name="maxFileSize"

30720
-----------------------------3219265987165
Content-Disposition: form-data; name="action"

storeFile
-----------------------------3219265987165
Content-Disposition: form-data; name="sfile"; filename="win.txt"
Content-Type: text/plain

ывапывапывап
-----------------------------3219265987165
Content-Disposition: form-data; name="agree"

1
-----------------------------3219265987165
Content-Disposition: form-data; name="x"

67
-----------------------------3219265987165
Content-Disposition: form-data; name="y"

10
-----------------------------3219265987165--

Content-Type: text/plain

ывапывапывап

string fileName;
           string siteURL="http://site/upload/";
           StreamWriter sw = null;
           string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
           

           fileName = Path.GetFullPath("C:\\win.txt");
 
           HttpWebRequest req = (HttpWebRequest)WebRequest.Create(siteURL);

           

           string postdata = "--" + boundary + "\r\nContent-Disposition: form-data; name=\"sfile\"; filename=\"" + Path.GetFileName(fileName) + "\""+"\r\nContent-Disposition: form-data; name=\"sfile\"; filename=\"" + Path.GetFileName(fileName) + "\"" "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"maxFileSize\"" + "\r\n\r\n30720" + "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"agree\"" + "\r\n\r\n1" + "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"x\"" + "\r\n\r\n67" + "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"y\"" + "\r\n\r\n10" + "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"action\"" + "\r\n\r\nstoreFile" + "\r\n--" + boundary + "\r\n";

           
           
           req.Method = "POST";
           req.ContentLength = postdata.Length;
           req.ContentType = "multipart/form-data; boundary=" + boundary;
           req.Accept = "text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1";
           req.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3";
           req.Referer = "http://sit/upload";


           sw = new StreamWriter(req.GetRequestStream());

           byte[] sendbuffer = Encoding.UTF8.GetBytes(postdata);

           sw.Write(postdata);
           sw.Close();

            WebResponse resp = (HttpWebResponse)req.GetResponse();
            StreamReader srData = new StreamReader(resp.GetResponseStream());

          string outHtml = srData.ReadToEnd();
           richTextBox1.Text= outHtml;
           resp.Close();
           srData.Close();