>That's what I was suggesting. It would just be a question of adding a few lines of code to the client EXE to have it listening to the server and a few lines on the server to push messages over the protocol of your choice (I'd use TCP/IP) - but I accept the service bus idea may be overkill for your requirements.

Do you know what keywords I should look up on Google to try to find example of such?

>If this was a browser based client you could look at the new HTML5 Server-Sent Events but your current WebSockets based solution is still probably the simplest solution.....

Ok