bind tag

<?xml version="1.0"?>

<!-- binding/ASInBindingTags.mxml -->

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

  xmlns:s="library://ns.adobe.com/flex/spark"

  xmlns:mx="library://ns.adobe.com/flex/mx">

<s:layout>

<s:VerticalLayout/>

</s:layout>

<fx:Script>

<![CDATA[

public function whatDogAte():String {

return "homework";

}

]]>

</fx:Script>

<fx:Binding

source="'The dog ate my '+ whatDogAte()"

destination="field1.text"/>

<fx:Binding

source="{'The dog ate my '+ whatDogAte()}"

destination="field2.text"/>

<fx:Binding

source="The dog ate my {whatDogAte()}"

destination="field3.text"/>

<s:TextArea id="field1"/>

<s:TextArea id="field2"/>

<s:TextArea id="field3"/>

</s:Application>