Hi Gregory,

>(1) I do not think it's possible to set checkboxes selectively

That's what I expected

>(2) You could try the standard ms way (ctrl, shift) etc, but I think you have to roll your own, ie

>- change the node's backcolor to a different value when it is selected
>- you'll have to write code to handle ctrl and shift (click), ie change the nodes' backcolor

Certainly an option, Gregory. I'll investigate!