Checkbox within a grid - How to get row number

[Jay Abrahm]

If I have a checkbox within a datagrid. How do I get the row number during checkbox selecting so that I can disable the row

private function disableCheckedRow(event:DataGridEvent):void{
 //DataGridEvent will not capture the nested event
}

<mx:DataGridColumn headerText="Not Applicable" dataField="online" editable="false">
   <mx:itemRenderer>
      <mx:Component>
      <mx:HBox horizontalAlign="center">
	 <mx:CheckBox />
      </mx:HBox>
      </mx:Component>						
   </mx:itemRenderer>
</mx:DataGridColumn>