[flexcoders] Accessing a datagrid row on itemClick event

[Slackware]

Hi,
I want to access a datagrid row on itemClick event, to change the height of 
this specific row. Is this possible? How?. something like this:

<mx:DataGrid styleName="dataGrid" 
itemClick="holdingsGrid_itemClickHandler(event)">

protected function holdingsGrid_itemClickHandler(event:ListEvent):void
                        {
this.holdingsGrid.rows[event.currentTarget.selectedIndex].height = 100;
                        }

Thanks in advance.