>It would be an ASP.NET page.

In your project, add a Web reference to your Web Service. Then, in your code, you may do something like this:

    Dim loWebService As UniversalThread.UniversalThread = New UniversalThread.UniversalThread
    llLogged = loWebService.Login(lcUsername, lcPassword)

Assuming the reference you have added points to UniversalThread and that you Web Service public class is Universal Thread. Then, the login method is simply an exemple of calling a method.