自定义tooltip

<?xml version="1.0" encoding="utf-8"?>
<mx:Application
    xmlns:mx=" http://www.adobe.com/2006/mxml"
    viewSourceURL=" src/UsingTooltips/index.html"
    width=" 400" height=" 170"
>
    <mx:Style>
        ToolTip
        {
            fontFamily : "Arial" ;
            fontSize : 19 ;
            fontStyle : "italic" ;
            color : #FFFFFF ;
            backgroundColor : #33CC99 ;
        }
    </mx:Style>

    <mx:Panel
        title=" Using ToolTips"
        toolTip=" Child components without &#13; ToolTips will inherit this."
    >   
        <mx:Form>   
            <mx:FormItem label=" Button with tooltip:" >
                <mx:Button label=" Roll over me!" toolTip=" You can click me too!" />       
            </mx:FormItem>

            <mx:FormItem label=" Button without tooltip:" >
                <mx:Button label=" I&apos;m unoriginal" />       
            </mx:FormItem>
        </mx:Form>
    </mx:Panel>   

</mx:Application>