Session Varaiables Help needed

Hi there.

I am trying to build a project that will deliver Microsoft Word 2013 templates to the "logged on user" default template folder. For a Win 7 and Office 2013 user the folder is:

C:\Users\%LoggedonUser%\AppData%\Roaming\Microsoft \Templates

This may change with different MS Office versions which will be built with a different location.
How do I make the %AppFolder% default to this location on the users computer?

Any help appreciated.

Thanks
Ken