Changing the Colour

I found this last year and i just remembered just then in a spur of the moment type thing… when I was studying for my exams for in year 10, there was a test that you could do and in was done in flash obviously… and they had changed the colours of the scroll bar that you get with Flash MX 2004…

How do you do that without adding a alpha channelled colour over the top of it? :red: