Using checkboxes as datasource of TileList - how do I then receive selected checkboxes?

Question

I've been googling and searching for this and it should be simple I'd imagine... (I'm new to Flex so that probably doesn't help:)...
I have an array that I create using CheckBox components. I then use this array as the dataprovider for a TileList and then also create a CheckBox itemrenderer.
The issue I'm having is that, I thought if I went over the underlying checkbox array at a later point (say a button click) - that I'd be able to see some selected items yet none of them show up selected as I iterate over them (even though I've checked some of the checkboxes.)
I have an event on the checkbox rendererer itself and when it fires I do see the selected property set - It's just going over the whole array that I'm not seeing them set. It's as if the underlying dataset is not being modified. What do I need to do so that I can capture the selected checkbox items?  (Is the issue something to do with the renderer being reused?)  I'm thinking getting a handle to checkbox items from from a TileList would be somewhat common so any help/examples appreciated.
Below is the pertinent code:
[CODE]
dataArray is an array of type [B]CheckBox[/B]
<mx:TileList id="reportMetricsBox"
        borderStyle="solid" height="100%" width="100%" maxColumns="3"
        columnWidth="110" paddingLeft="0" textAlign="left" borderThickness="0"
        dataProvider="{dataArray}">
   <mx:itemRenderer>
       <mx:Component>
           <mx:CheckBox click="handleClick(event)">
               <mx:Script>
                   <![CDATA[
                       import com.foo.event.CheckBoxEvent;
                       private function handleClick(event:Event):void {
                           dispatchEvent(new CheckBoxEvent(CheckBoxEvent.CLICKED, CheckBox(this)));
                   ]]>
               </mx:Script>
           </mx:CheckBox>
       </mx:Component>
   </mx:itemRenderer>
</mx:TileList>
[/CODE]

Answer 1

Here's what I did to fix it...
in my item renderer click handler I set the data selected item:
private function onChange(event:Event):void {
     dispatchEvent(new CheckBoxEvent(CheckBoxEvent.CLICKED, CheckBox(this)));
    data.selected = !data.selected;
I'm assuming that's what I should be doing?