ping w/ messagebox

C# corner…I am in need of your help and guidance. 

I would like to build a c# application that I can place on a users machine with the indentions of sending me (static IP or hostname) a message when said users connects to the network.  Does that make sense?  So, when my high-end users logs into the network I'm notified via message(or some electronically mean) when they do so.  Eventually, I'd like to add more detail (e.g. what services are running and so on).  I'm not sure of the best method to achieve this goal, and would appreciate your advice.