Custom formatting function accepts a formatting pattern
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
import mx.formatters.*;
public var fmtZip:ZipCodeFormatter = new ZipCodeFormatter();
public function formatThis(plainText:String,formatString:String):String
{
fmtZip.formatString = formatString;
return(fmtZip.format(plainText));
}
</mx:Script>
<mx:Label text="U.S Zip Code: {formatThis('12345','#####')}" />
</mx:Application>
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