Dim cookie As CookieContainer

        Dim postdata As String = "username=user&password=pass123"
        Dim Url As String = "http://www.abc.php"
 
        Dim webrequest As HttpWebRequest
        Dim webresponse As HttpWebResponse
        Dim streamreader As StreamReader
        Dim sw As StreamWriter
        Dim myWriter As StreamWriter = Nothing
        Dim SomeBytes() As Byte
        Dim UrlEncoded As New StringBuilder
        Dim reserved() As Char = {ChrW(63), ChrW(61), ChrW(38)}
 
 
        webrequest = System.Net.WebRequest.Create(Url)
        webrequest.CookieContainer = cookie
        webrequest.Credentials = CredentialCache.DefaultCredentials
        webrequest.Accept = "image/gif, image/x-xbitmap, image/jpeg," & _
          "image/pjpeg, application/x-shockwave-flash, */*"
        webrequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT" & _
        "5.0; .NET CLR 1.0.3705;)"
        webrequest.Method = "POST"
        webrequest.ContentType = "application/x-www-form-urlencoded"
 
 
 
        If postdata <> Nothing Then
            Dim i As Integer = 0
            Dim j As Integer
            While i < postdata.Length
                j = postdata.IndexOfAny(reserved, i)
 
                If j = -1 Then
                    UrlEncoded.Append(System.Web.HttpUtility.UrlEncode( _
                      postdata.Substring(i, postdata.Length - i)))
                    Exit While
                End If
 
                UrlEncoded.Append(System.Web.HttpUtility.UrlEncode( _
                  postdata.Substring(i, j - i)))
                UrlEncoded.Append(postdata.Substring(j, 1))
                i = j + 1
            End While
 
            SomeBytes = System.Text.Encoding.GetEncoding(1252).GetBytes( _
              UrlEncoded.ToString())
            webrequest.ContentLength = SomeBytes.Length
        Else
            webrequest.ContentLength = 0
        End If
 
 
        Dim requestStream As Stream = webrequest.GetRequestStream()
        requestStream.Write(SomeBytes, 0, SomeBytes.Length)
        requestStream.Close()
 
        'webrequest.CookieContainer = cookie
        webresponse = webrequest.GetResponse
        streamreader = New StreamReader(webresponse.GetResponseStream, _
          Encoding.GetEncoding(1252))
        html = streamreader.ReadToEnd.Trim
        streamreader.Close()
        webresponse.Close()

        webrequest = System.Net.WebRequest.Create("http://www.abc.php/defg")
 
        'Cookie-Container für diese Seite mit "Cookie" festlegen
        webrequest.CookieContainer = cookie
 
        'Request Methode "GET" festlegen
        webrequest.Method = "GET"
 
        'Response für den request anfordern
        webresponse = webrequest.GetResponse
 
        'Antwortstream lesen, speichern und schliessen
        streamreader = New StreamReader(webresponse.GetResponseStream, _
          Encoding.Default)
        html = streamreader.ReadToEnd.Trim
        streamreader.Close()
        webresponse.Close()