Hi Keith Turner,
You'll need to make sure that whatever you need to do from the Sharp's side for CEC is configured. For Samsung TVs, this involves enabling a feature and connecting the HDMI cable to a particular port. For the sound bar, you simply need to press the button on the remote marked as Anynet+; it's on the second row below the power buttons.
I have a Sharp Aquos LC-52D85UN TV with a number of HDMI inputs. I believe it is CEC but not ARC enabled. It is currently connected to a Bell Expressvu Satellite box via an HDMI cable on HDMI Input 7. All I want to do is connect a Samsung HW-E450 sound bar to this setup and be able to control the sound volume with the TV remote (in this case a Bell remote which is programmed to turn the TV on/off and raise/lower the volume). How can I do this? The TV has a number of HDMI inputs AND the Sound Bar has an HDMI IN and HDMI out connection. I've looked high and low and can find no answer.