flex toolTip式样设置

flex toolTip样式设置
???????<mx:Script>
???<![CDATA[
???????[Bindable]
???????private var myToolTipText:String ="<b>This is a boldtoolTip</b>" ;
???]]>
</mx:Script>
<mx:Style source="style.css"/>
???<mx:Button label="hover to get tooltip"toolTip="{myToolTipText}"
x="36" y="28"/>
</mx:Application>