Scrollbar Component Help!

Hey everyone, I was just making my first custom scroll bar by editing the scroll bar components and I had a question. I wanted to know if it was possible to make the dragger of the scrollbar (flash calls it fsb_thumb_middle) stay the same size no matter the amount of content in the textbox. For example, when more content is added to the textbox, the dragger becomes smaller, and when less content is added the dragger becomes larger. I wanted to know if I can make it so the dragger is the same size no matter what.

-Well thanks in advance!