helloworld.asmx

This is a book about vb.you could learn this from this book

<%@ WebService Language="VB" Class="HelloWorld" %>

Imports System.Web.Services

Public Class HelloWorld

  <WebMethod, EncryptionExtension(Encrypt:=EncryptMode.None)> _
  Public Function SayHello() As String
    Return "Secret message"
  End Function

End Class