component sample : ./components/comp1.mxml ...

component.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" styleName="plain" layout="absolute" xmlns:components="components.*" 
	width="829" height="529" pageTitle="Flex Basicサンプル：カスタムMXMLコンポーネント(MXML Components)">

	<components:comp1 id="comp1" y="51" dispString="{comp2.textinput1.text}" />
	<components:comp2 id="comp2" x="408" y="51" />
	
	<mx:ApplicationControlBar x="10" y="0" width="100%">
		<mx:Label text="メインアプリケーション" fontSize="16" />
	</mx:ApplicationControlBar> 
		
</mx:Application>