Click to change style
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Panel id="panel" width="250" height="200"> <mx:TextArea id="textArea" width="80%" height="80%" text="Example" /> <mx:ControlBar> <mx:Button label="Random Font Size" click="textArea.setStyle('fontSize', Math.random( ) * 20 + 8)" /> <mx:ColorPicker id="color" change="panel.setStyle('backgroundColor', color.value)" /> </mx:ControlBar> </mx:Panel> </mx:Application>