detect an infared code

[r00t]

I am trying to get an infared signal being sent from an emitter (think along the lines of a remote control). I know I can use a fotoransistor on a breadboard to capture/detect the signal, but I have no idea how to get the code being sent out of it. I need the hex so i can re broadca st it. How can I get this info?

There are websites that have IR codes like the one I'm looking for but they don't have particular for this device