Set liveDragging to true to dispatch change event continuously as moving the thumb
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Script> import mx.events.SliderEvent; import mx.controls.sliderClasses.Slider; private function sliderChangeLive(event:SliderEvent):void { var currentSlider:Slider=Slider(event.currentTarget); thumbLive.text=String(currentSlider.value); } </mx:Script> <mx:HSlider liveDragging="true" change="sliderChangeLive(event);" /> <mx:TextArea id="thumbLive" /> </mx:Application>