Customized Scrollbar

I saw the tutorial on creating a customized scroll bar, but I didn’t quite understand how to apply it to a dynamic text box. Right now I have a dynamic text box pulling in information from an XML file and have scroll btns for the text. However the user feedback is that they’d like a scrollbar. Also I’d prefer to create my own as opposed to using the component because I would really like to keep with a particular design. Any suggestions??? Thanks.