I'm not sure how I would search for this so I'm sorry if this has already been covered elsewhere.
Here's what I want to do...
From a form I execute a backend service that runs a process against a client application. The calling web page contains a text area registered with this backend service to receive and append status event messages during the backend service progress, in essence a real time log viewer.
Ideally I'd like to find a tutorial and/or examples of rolling such a service/listener.