<?xml version="1.0" encoding="utf-8"?>
<mx:Application 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    layout="vertical"
    verticalAlign="middle" horizontalAlign="center"
    creationComplete="init();" viewSourceURL="srcview/index.html" xmlns="*">
    
    <mx:Script>
        <![CDATA[
            private function init():void {
                var array:Array = new Array();
                
                for(var i:int=1; i<20; i++) {
                    array.push("Item " + i);            
                }
                
                list.dataProvider = array;
            }
            
        ]]>
    </mx:Script>
    
    <mx:VBox horizontalAlign="left" verticalGap="0">
        
        <AlternateSelectionList id="list"
            allowMultipleSelection="true"
             width="200" height="300" 
             itemRenderer="CheckBoxItemRenderer"
              />
    </mx:VBox>
    
    
         
</mx:Application>