I want to start by saying that I'm a complete novice and will be doing this in the near future, I'm just trying to be prepared.
I've found this:http://www.creativecrash.com/forums/mel/topics/slider-scripting-for-mel-newbie but it sounds like that's a chanel box attribute. Appologies if that post actually does answer my question, as I said this is preparation and I don't have time to fully research the topic.
I'd like to add in-viewport sliders to functions, think of the Thickness / Offset / Divisions for Extrude. Could someone point me in the right direction?