You could set a password on the document.
I am in working from an hotel room and do not have access Word right now, but I kind of remember that there is a parameter to set the password on the Save and/or SaveAs method of the Word.Document class.
There is also a parameter to specify the password when reopening the document on the Open method of the Word.Documents collection.
Only your application and users who know the password (such as yourself), will then be able to use the document.
Jacques Bourgeois
JBFI
http://www3.sympatico.ca/jbfi/homeus.htm