Parameter in URL

Imports System.Net
Imports System.IO
 
Partial Class _Default
    Inherits System.Web.UI.Page
 
 
    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
 
        Dim client As New WebClient()
        Dim baseurl As String = "http://203.129.203.254/sms/user/urlsms.php?username=kaptest&pass=test123&senderid=KAPSYS&message=HTTP API Test&dest_mobileno=919xxxxxxxx&response=Y"
        Dim Data As Stream = client.OpenRead(baseurl)
        Dim rea ...