Peter,

DE designer doesn't use Treeview control. I suspect that you're looking for the wrong control.

>Wondering if anyone knows of an ActiveX control that supports the creation of "connecting lines" between nodes of two treeview lists. This functionality exists, for example, in a form's Data Environment when you define relationships between files by dragging a field in a child table onto a controlling index in the parent table.
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>I have looked at some of the documentation available on various Treeview controls but have not found anything that shows how to do this.