Problem with web services

[Vincenzo Di Stefano]

Hi all,   can anyone help me!?! My problem is conceptually very simple, but "programmingly" not so easy... for my experience. I'll explain my problem!!! I'm developing a web service... a simple one, just to understand some basical concepts, and I need to know the IP address of the "client" side... better: I have the service on one PC, and from another one I call the service. What I need is the IP address of the second PC (the calling machine), but I'm not succeeding in find any method to discover this address. Has someone of you some answer to my question!?!   Thanks in advance   Vincenzo