Office 2003 Shared Addin - Adding a MessageFilter to the Aplicatio

[Chris White]

In Office 2003 I need to modify some pages such as the file property form
(add an additional button, to fire custom code)

I have thought I would need to add a MessageFilter to the application object
for the Office program.

But I cannot work out how to do this

Is this the best way to add an extra button to the file properties dialog box?

Is there any other ways to do this?

I am using
Office 2003
Visual Studio 2003
Windows XP

Thanks in advance
Chris White