After you create your services, you need to run your Web.Host project.
To make sure the service is running, you need to type your service name in the address bar of your browser i.e. http://localhost:12345/MyService.svc
(Assuming my port is 12345 and my service name is MyService)
Once your Web.Host is running, you can then use "Add Service Reference" from Visual Studio in your UI.Process.
Hope this helps!