>A couple of reasons:
>
>(1) I've got a lot of columns to show to the right of the "tree" -- some numeric, some character. There are lot of events that I respond to based on these columns. TreeView doesn't handle this; I don't know about MSFlexGrid ActiveX controls.
>
>(2) I have a lot of investment throughout a lot of applications using this grid-based solution. Inertia can be a powerful force.
>
>So, there'd have to be a heck of a good reason for me to switch ... the namby/pamby appearance of my +/- wouldn't be sufficient.
>
>Cheers,
>
>Jim

O!
I see.
How big they should be?
Check: http://mabblog.com/blog/?p=133 to see if these icons there could help. Also if you google: plus minus icons you'll see how many results will be there.