>Cetin,
>
>I've never tried it, but my impression was that one can add an ActiveX to a spreadsheet. If so, perhaps you could use Excel's VBA to populate a TreeView control driven by data in specific range of your spreadsheet?
>
>Malcolm

Malcolm,
This is also something I thought but not dared yet. I'd put an hierarchicalflexgrid then. Still I've a problem in that the data amount is over what those activexes can handle.
Cetin