How can I run a Windows GUI application on as a service?

Question

I have an existing GUI application that should have been implemented as a service. Basically, I need to be able to remotely log onto and off of the Windows 2003 server and s

Answer 1

A service shouldn't have a GUI, since it should run without any needing any intervention from a user, and there are all sorts of problems associated with finding and communicating with the correct users desktop.

Since, presumably the reason for asking this is to be able to remotely monitor the application, the way to do it would be to have two applications. The service side (written basically as a console application) and the client/monitoring GUI side. The service would use some remote connectivity (when I did this I used Named Pipes) to communicate with the client/monitoring application. Either should be able to run without the other, and certainly the service should be able to run with out the client.