variable to custom component - flex - variables

Question

I'm trying to pass a variable from my main flex application to a custom component I've created, but haven't really figured anything out.
my variable is just a string - public var test:String = "a test";
my custom component is implement in my main application like this - <ns1:finaltest includeIn="FinalTest" x="26" y="19" />
In my custom component 'finaltest' I'd like just to display the variable 'test'. something like this - finalmessage.text = test;

Answer 1

MainApp.mxml
<?xml version="1.0" encoding="utf-8"?>
<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"
minWidth="955" minHeight="600" xmlns:local="*"
>
<fx:Script>
<![CDATA[
[Bindable]
public var test:String = "a test";
]]>
</fx:Script>
<local:FinalTest finalMessage="{test}" />
</s:Application>
FinalTest.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
width="400" height="300"
>
<fx:Script>
<![CDATA[
[Bindable]
public var finalMessage:String;
]]>
</fx:Script>
<s:Label text="{finalMessage}" />
</s:Group>