[flexcoders] change button color dynamically?

[markflex2007]

The following code can change Button Color

<mx:Button  label="test"   fillColors="[#00ff00, #00ff00, #00ff00, #00ff00]" 
fillAlphas="[1, 1, 1, 1]"/>

May I use setStyle in AS TO change fillColors, please show me how to do that?

May I use AS code change fillColors dynamically with dynamic data.

Thanks

Mark