Scrolling in graphics mode (ie Stock ticker)

Hi.

        I have a problem, I am trying to write a stock ticker type thing on
the top of my screen at the same time I am trying to get input from a
mouse. I have it working sort of but the ticker has this annoying
flash because it redraws to slow. any one have a better way t do it
than writing it to the screen using outtext then writing over it in
black to get ride of it?

Thanx
        Steve.