You're getting several things mixed up together here. DataBinding is a
technique available in VB (not in VBA) for linking forms and form controls
to a datasource. The idea is that you create a connection between the form
and a recordset; the controls on the form -- such as textboxes -- can then
be bound to specific fields to automatically display or update data from the
current recordset row.

Without going into detail, the BoundValue property relates to how you set up
that binding connection.

You can set up an OLE field to work with the content of a Word document; but
apart from that, to display text from an external document you need to write
code to open the document, extract the text, and close the document.