[flexcoders] Extend label class to always show tooltips?

[robert.ross27]

Hi folks,

I'm trying to make tooltips in a datagrid appear, below and to the 
right of the mouse, as they would with the Label component. 
so in the column...

<mx:DataGridColumn 
        itemRenderer="mx.controls.Label"
        dataField="name" 
        headerText="List"/>


However this means that the tooltip will only show if the Label is too 
long for the cell or is truncated.

Can anyone tell me how to extend the Label class so that the tooltip 
will always be shown?