.net - how to control in client application -

i have created 2 applications; server , client.
need able control client server

example:

if have music player broadcast video want when play video able stop ,play, mute client server

please tell me how start using sockets.

for starters..

1. establish socket connection client server.
2. listen keyboard events on client ( machine controlling from)
3. using sockets transfer keyboard messages client server(the machine control)
4. as receive message on server use sendmessage win32 api send keyboard messages target application using window handle