Client-server app

I'm trying to find a client-server application on the internet, as example for an application I'm trying to make. Among other things, I want to be able to start up a program from one system on another system through a TCP/IP network connection, but also synchronizing the systemtime.

Does any have an example for me, or know where I have to look for code.

Thanks,
Niels

I have a winsock demo on my site if that is of any help to you ;)