Как из определенного url, получить определенный текст и отобразить его в программе

Public Class Form1
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim UrlSite As String = TextBox1.Text
        Dim TextSite = (New System.Net.WebClient).DownloadString(UrlSite)
        MsgBox(GetPars(TextSite, "<title>", "</title>"), MsgBoxStyle.Information, "Title Site")
    End Sub
 
    Public Function GetPars(ByRef strSource As String, ByRef strStart As String, ByRef strEnd As String, Optional ByRef startPos As Integer = 0) As String
        Dim iPos As Integer, iEnd As Integer, lenStart As Integer = strStart.Length
        Dim strResult As String
        strResult = String.Empty
        iPos = strSource.IndexOf(strStart, startPos)
        iEnd = strSource.IndexOf(strEnd, iPos + lenStart)
        If iPos <> -1 AndAlso iEnd <> -1 Then
            strResult = strSource.Substring(iPos + lenStart, iEnd - (iPos + lenStart))
        End If
        Return strResult
    End Function
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        TextBox1.Text = "http://cyberforum.ru/"
    End Sub
 
End Class