<mx:DataGridColumn dataField="checkbox" headerText="" width="40" itemRenderer="CheckBoxRenderer"/>
<mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml" width="100%" height="100%"
horizontalAlign="center" verticalAlign="middle"
verticalScrollPolicy="off" horizontalScrollPolicy="off" dataChange="getSelected()">
<mx:Script>
<![CDATA[
private function getSelected():void {
if (data.checkbox == true) {
chkBox.selected = true;
} else {
chkBox.selected = false;
}
}
]]>
</mx:Script>
<mx:CheckBox id="chkBox" change="{data.checkbox = chkBox.selected}" />
</mx:VBox>