[AS3] UIScrollBar question

[Pkiller162]

Ok so I have a dynamic text field that I keep adding to (sorta like a console).
I want it so when the text reaches of the bottom of the textbox, you can start scrolling down. So basically, how would I make the little thing you drag on the UIScrollbar automaticly resize itself?

EDIT: Haha, solved it myself. It was scrollbar.update()