When using NWDir, the "NWDir.FullName" shows the path you are reffering to.

In "View Object" mode in a form, if you select the NWDir object, and in the Properties Window go to FullName, then you can click on the "..." and view the "Property Pages" and then select the desired Tree and select Context

Essentially... I want to be able to browse the tree, select a context, and then that gets put into textbox.text