Can I configure voice dialer to be usable in hands-free mode?

I use Cyanogenmod 11. It comes with an app called Voice Dialer. The only problem with it is that you have to click on it to use it, kind of defeating the whole point of it. Is there a way to have it start when I press the "control" (I don't know how to call that button, it's used to pause music or hang up a call) on my earpiece?