<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/08/26/setting-the-vertical-scrollbar-policy-on-a-textarea-control-in-flex/ -->
<mx:Application name="TextArea_verticalScrollPolicy_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:Script>
        <![CDATA[
            import mx.core.ScrollPolicy;
        ]]>
    </mx:Script>

    <mx:String id="lorem" source="data/lorem.html" />

    <mx:ApplicationControlBar dock="true">
        <mx:Form styleName="plain">
            <mx:FormItem label="verticalScrollPolicy:">
                <mx:ComboBox id="comboBox"
                        dataProvider="{[ScrollPolicy.AUTO,
                                        ScrollPolicy.ON,
                                        ScrollPolicy.OFF]}" />
            </mx:FormItem>
        </mx:Form>
        <mx:Spacer width="100%" />
        <mx:Button label="Lorem Ipsum me!"
                click="textArea.htmlText = lorem;" />
        <mx:Button label="Clear text"
                click="textArea.htmlText = '';" />
    </mx:ApplicationControlBar>

    <mx:TextArea id="textArea"
            verticalScrollPolicy="{comboBox.selectedItem}"
            textAlign="justify"
            width="100%"
            height="100%" />

</mx:Application>