<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/12/23/removing-the-drop-shadow-from-the-datefield-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="top"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:Style>
        .myDateChooser {
            dropShadowEnabled: false;
        }
    </mx:Style>

    <mx:Form>
        <mx:FormItem label="With drop shadow:">
            <mx:DateField />
        </mx:FormItem>
        <mx:FormItem label="Without drop shadow:">
            <mx:DateField dateChooserStyleName="myDateChooser" />
        </mx:FormItem>
    </mx:Form>

</mx:Application>