Quick Question

I am currently trying to load a captcha image in a picture box from Twitter.. the current code I have is this:

Code:

Dim texts As New TextBox
        Dim allelements2 As HtmlElementCollection = WebBrowser1.Document.GetElementsByTagName("img")
        For Each webpageselement As HtmlElement In allelements2
            If webpageselement.GetAttribute("id").ToString.Contains("recaptcha_image") Then
                texts.AppendText(webpageselement.GetAttribute("src"))
                PictureBox1.Image = New System.Drawing.Bitmap(New IO.MemoryStream(New System.Net.WebClient().DownloadData(texts.Text)))
            End If
        Next

What am I doing wrong?