<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/10/12/aligning-the-label-placement-and-text-alignment-on-a-progressbar-control-in-flex/ -->
<mx:Application name="ProgressBar_textAlign_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Style>
        ProgressBar {
            textAlign: "center";
            labelWidth: 200;
        }
    </mx:Style>

    <mx:ProgressBar id="progressBar"
            indeterminate="true"
            labelPlacement="bottom"
            width="200" />

</mx:Application>