Using \n escaped newline character and the
entity for Tooltip text
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<!-- tooltips/ToolTipNewlines.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
initialize="doSomething(event)">
<fx:Script>
public function doSomething(event:Event):void {
// Use the \n to force a line break in ActionScript.
b1.toolTip = "Click this button \nto clear the form.";
}
</fx:Script>
<s:Button id="b1" label="Clear" width="100" />
<!-- Use to force a line break in MXML tags. -->
<s:Button id="b2" label="Submit" width="100"
toolTip="Click this button to submit the form." />
</s:Application>
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