Dated 8-5-05, Graham Mayor (MVP-Word) answered a security issue as follows:

It is not possible to set the macro security from vba - otherwise you would
never be able to safely open a third party document. What is probably
happening here is that you have the macro security setting flagged to trust
installed templates and add-ins. Again you cannot set this remotely.

In the 2003 Microsoft help, "Automating the Visual Basic Editor" describes
recommended behavior is to check the Trust access to Visual Basic Project
box for the duration of a macro, and uncheck this box after the macro has
finished.  Can I assume this is accomplished automatically with vba code?  I
also assume the security level is set to high?

Can someone direct me to more detailed instructions, code for the
recommended solution above, or some remedy for security running vba macros.

Also, how would i go about purchasing a digital signature, and what are
typical associated costs.

Thank you