Is there a way to use the properties of , say, a vertical scroll bar that's part of a textbox?

i've been trying to figure out a way you can interact with the scroll bar, but i can't find anything on it!

if not, is it possible to make a seperate vertical scroll bar, and then somehow bind it to the textbox so the textbox will scroll up and down when you click corresponding arrows?

Any help would be greatly appreciated! THanks very much.

~Dan