In max script the are setLoopShift setRingShift if you press the button it will appear in the listener for Rings $.setRingShift -1 true false or $.setRingShift +1 true false if you drag any of these commands onto the main toolbar it will create a new button and an entry under 'drag and drop' in the customise UI menu. the…
what exactly do you want to do? If its bind them to hotkeys or create a custom UI buttons for them then look to my last post (i ninja edited it :) ) executing the commands with -1 or +1 one will move it 1 loop or ring. increasing that number just makes the jump bigger. In Script Off the top of my head I'd use the spinners…