frameworks/projects/framework/asdoc/en_US/mx/controls/examples/SimpleProgressBar.mxml

<?xml version="1.0" encoding="utf-8"?>
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<!-- Simple example to demonstrate the Halo ProgressBar control. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/mx">

    <fx:Script>
        <![CDATA[
            private var j:uint = 0;

            // Event handler function to set the value of the 
            // Halo ProgressBar control.
            private function runit():void
            {
                if (j < 100) {
                    j += 10;
                } else if (j >= 100) {
                    j = 0;
                }
                bar.setProgress(j, 100);
                bar.label = "Current Progress: " + j + "%";
            }
        ]]>    
    </fx:Script>

    <s:Panel title="Halo ProgressBar Control Example"
            width="75%" height="75%"  
            horizontalCenter="0" verticalCenter="0">
        <s:VGroup left="10" right="10" top="10" bottom="10">
            <s:Label width="100%" color="blue"
                    text="Click the button to increment the progress bar." />
            <s:Button id="Speed" label="Run" click="runit();"/>

            <mx:ProgressBar id="bar" labelPlacement="bottom" chromeColor="red"
                    minimum="0" visible="true" maximum="100" label="CurrentProgress 0%" 
                    direction="right" mode="manual" width="100%"/>
        </s:VGroup>
    </s:Panel>

</s:Application>