>>>You also get 3 states for values if 0 (false), 1 (true), and the indeterminate state for other than 0,1 values.
>>
>>In VFP, right?
>>Do you know if the treeview in VFP supports checkboxes and if so does the checkboxes in the treeview support the 3rd state?
>
>I think there's two versions of the treeview ActiveX floating around in use by VFP. One supports the checkbox (don't know about the 3 states), and the other doesn't have any checkbox.
>
>[update]
>I just looked into (V5/sp2) no checkbox. V6 (with checkbox) only support 0/non-zero and .t./.f., no .null. value. Both Microsoft controls.

Thanks for checking