作るのに参考にしたサイト
とある技術の備忘録 – C#でニコ生からコメント取得
http://d.hatena.ne.jp/r7kamura/20091123/1258948977

NicoPITA Blog.
http://nicopita.info/NicoPITA/

今回は、VB.NET で作成していきます。

Imports System.Net.Sockets
Imports System.Text

Module Module1

    Sub Main()

        'http://watch.live.nicovideo.jp/api/getplayerstatus?v=lv何とか
        'msの値
        '取ってくるのはまた別に書くよ！
        Dim thread As Integer = 1062986843
        Dim addr As String = "msg102.live.nicovideo.jp"
        Dim port As Integer = 2813

        Dim more As String = ""
        'res_from で過去ログ取得 -10にすると、-10コメント前を取ってくる
        Dim req = String.Format("<thread thread=""{0}"" version=""20061206"" res_from=""-10"" /> ", thread)
        Dim tcp As New TcpClient(addr, Integer.Parse(port.ToString))
        Dim ns As NetworkStream = tcp.GetStream()
        Dim sendBytes As Byte() = Encoding.UTF8.GetBytes(req)
        sendBytes(sendBytes.Length - 1) = 0

        ns.Write(sendBytes, 0, sendBytes.Length)


        Dim resSize As Integer

        Do
            Dim resBytes As Byte() = New Byte(2048) {}

            resSize = ns.Read(resBytes, 0, resBytes.Length)
            If resSize = 0 Then
                Exit Do
            End If

            Dim message As String = Encoding.UTF8.GetString(resBytes)
            'Console.WriteLine(message)

            message = more & message
            more = ""
            Dim elements As String() = message.Split(New String() {vbNullChar}, StringSplitOptions.RemoveEmptyEntries)

            '<chat thread="1062986843" no="1" vpos="6300" date="1293718792" mail="184" user_id="mwR5e8FptFf6-O3gZtQ3ceHAgPU" premium="3" anonymity="1">テスト！</chat>

            For Each receiveData As String In elements

                '帰ってきたXMLに"<chat"から"</chat>"まで全部あったらで分ける
                '文字が多いいと、分割して帰ってくるから、
                If receiveData.StartsWith("<chat") AndAlso receiveData.EndsWith("</chat>") Then
                    OnReceiveChat(receiveData)
                Else
                    'チャットが分割で来たときの処理。
                    If receiveData.StartsWith("<thread resultcode=") = False Then
                        If receiveData.StartsWith("<view_counter") = True Then
                            'ここは、ニコニコ実況ようだから、スルーでおｋ
                        ElseIf receiveData.Contains("</chat>") = False Then
                            more = receiveData
                        End If
                    End If

                End If

            Next

        Loop While ns.CanRead
    End Sub

    Public Sub OnReceiveChat(ByVal receiveData As String)
        Dim commentNo As String
        Dim commentVpos As String
        Dim commentDate As String
        Dim commentMaill As String
        Dim commentUserID As String
        Dim commentPremium As String
        Dim commentAnonymity As String
        Dim commentText As String
        Dim commentThread As Integer
        Dim commentLoom As String = ""

        Dim userName As String = Nothing




        Dim comment = XElement.Parse(receiveData)
        commentNo = comment.@no
        commentDate = comment.@date
        commentVpos = comment.@vpos
        commentMaill = comment.@mail
        commentUserID = comment.@user_id
        commentPremium = comment.@premium

        '時々帰って来ない時がある。
        If commentPremium = Nothing Then
            commentPremium = "0"
        End If

        commentAnonymity = comment.@anonymity
        commentThread = CInt(comment.@thread)
        commentText = comment.Value



        'ユーザーレベル種分け
        If commentPremium = "0" Then
            commentPremium = "一般"
        ElseIf commentPremium = "1" Then
            commentPremium = "プレミアム"
        ElseIf commentPremium = "3" Then
            commentPremium = "放送主"
        ElseIf commentPremium = "7" Then
            commentPremium = "BSP"
        End If

        '0=一般
        '1=プレミアム
        '2=放送終了後に送られてくる、/disconnect のレベル
        '3=放送主
        '7=BSP

        '公式生見ると25とかある時がある。何故かはわからん

        Console.WriteLine("{0} : {1}", commentNo, commentText)
        'Console.Write(vbCrLf & CommentNo & " " & CommentVpos & " " & CommentDate & " " & CommentMaill & " " & CommentUserID & " " & CommentPremium & " " & CommentAnonymity & " " & CommentText)
 
    End Sub

End Module

お疲れ様でした　一応取得部分は完成です。
次は、getplayerstatusから値を取るコードを書きたいと思います。