It is called "Grab swatch to Hypershade/Visor".
Just open your renderview, and do a test render of your piece.
Then, in the View menu of the Renderview window, at the bottom of that menulist will be that command.
Click that, and the directions will prompt you at the bottom of your render
Just make a selection of what you want, then middle-mouse-drag it to your shader swatch in your hypershade, and viola!
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS