[2008] How To Loop This Code With User Input?

I have a form that takes user input rss feeds and puts them into listbox1. Then I have a listbox2 that contains rss services that I want to ping the urls from listbox1 and loop through listbox2 until completed.

Here is the code that I currently have on the ping button:

vb Code:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim listToPing As New ArrayList
        Dim pingURL As String = ""
        Dim blogURL As String = ""
        Dim blogName As String = ""
 
        With listToPing
            .Add("http://rpc.technorati.com/rpc/ping")
            .Add("http://api.feedster.com/ping")
            .Add("http://ping.feedburner.com")
            .Add("http://blog.goo.ne.jp/XMLRPC")
            .Add("http://ping.blo.gs/")
            .Add("http://ping.bloggers.jp/rpc/")
            .Add("http://ping.blogmura.jp/rpc/")
            .Add("http://ping.cocolog-nifty.com/xmlrpc")
            .Add("http://ping.syndic8.com/xmlrpc.php")
            .Add("http://rpc.blogbuzzmachine.com/RPC2")
            .Add("http://rpc.blogrolling.com/pinger/")
 
        End With
 
        For i As Integer = 0 To listToPing.Count - 1
            Try
                pingURL = listToPing.Item(i).ToString
                Dim technoratiPing As Net.HttpWebRequest = CType(Net.WebRequest.Create(pingURL), Net.HttpWebRequest)
                technoratiPing.Method = "POST"
                technoratiPing.ContentType = "text/xml"
                Dim streamPingRequest As IO.Stream = CType(technoratiPing.GetRequestStream, IO.Stream)
                Dim xmlPing As Xml.XmlWriter = New Xml.XmlTextWriter(streamPingRequest, System.Text.Encoding.UTF8)
                xmlPing.WriteStartDocument()
                xmlPing.WriteStartElement("methodCall")
                xmlPing.WriteElementString("methodName", "weblogUpdates.ping")
                xmlPing.WriteStartElement("params")
                xmlPing.WriteStartElement("param")
                xmlPing.WriteElementString("value", blogName)
                xmlPing.WriteEndElement()
                xmlPing.WriteStartElement("param")
                xmlPing.WriteElementString("value", blogURL)
                xmlPing.WriteEndElement()
                xmlPing.WriteEndElement()
                xmlPing.WriteEndElement()
                xmlPing.Close()
                Dim technoratiPingResponse As Net.HttpWebResponse = CType(technoratiPing.GetResponse, Net.HttpWebResponse)
                Dim streamPingResponse As IO.StreamReader = New IO.StreamReader(technoratiPingResponse.GetResponseStream)
                Dim strResult As String = streamPingResponse.ReadToEnd
                streamPingResponse.Close()
                technoratiPingResponse.Close()
            Catch ex As Exception
                'Add code here to flag a service as broken
            End Try
        Next
    End Sub

How do I get it to loop through each rss feed from listbox1 and post them to the rss services from listbox2?

Chris