Your message is a little confusing.
Did you mean something like this? Hobby Robotics » Using Relays with Arduino – Turning on the Lights
or this? http://www.instructables.com/id/Connecting-a-12V-Relay-to-Arduino/
or this? http://blog.makezine.com/archive/2009/02/connecting_a_relay_to_arduino.html
or this? Arduino Playground - SolenoidTutorial
Korman