<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/03/30/toggling-the-current-date-highlighting-on-a-datechooser-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:ApplicationControlBar dock="true">
        <mx:CheckBox id="checkBox"
                label="showToday:"
                labelPlacement="left" />
    </mx:ApplicationControlBar>

    <mx:DateChooser id="dateChooser"
            showToday="{checkBox.selected}" />

</mx:Application>