Dim req As Net.HttpWebRequest = DirectCast(Net.HttpWebRequest.Create("http://www.cmt.es/cmt_ptl_ext/Captcha.jpg"), Net.HttpWebRequest)
        Dim res As Net.HttpWebResponse = DirectCast(req.GetResponse, Net.HttpWebResponse)
        Dim img As Image = New System.Drawing.Bitmap(res.GetResponseStream)
        res.Close()
        PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
        PictureBox1.Image = img

http://www.cmt.es/cmt_ptl_ext/SelectOption.do?nav=estado_num

http://www.cmt.es/cmt_ptl_ext/SelectOption.do?tb_numMov="NUMERO SIN COMILLAS"&tbCaptcha="CAPTCHA SIN COMILLAS"&Submit=Buscar+&validar=si&tipo=buscar&nav=estado_num&pagina=&detalles=&nombre=&download=&idDetalle=&tipo=&categoria=

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
WebBrowser1.Navigate("http://www.cmt.es/cmt_ptl_ext/SelectOption.do?nav=estado_num")
End Sub
 
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
For Each captcha As HtmlElement In WebBrowser1.Document.Images
Dim turing = captcha.GetAttribute("SRC")
If turing.Contains("Captcha.jpg") Then
PictureBox1.Load(turing)
End If
Next
End Sub

webbrowser1.navigation("http;//....com/....php?order-event=reset")

WebBrowser1.Document.GetElementById("Tfono").Focus()
        If WebBrowser1.Focused Then
        SendKeys.Send("{ENTER}")
        End if

Webbrowser1.navigate("www.prueba.com?tal=pepito")