Then just add a button to the document template (or a global template) to
print the document - as described in the linked page.
As explained in the other thread

you will have to intercept the print
routine to establish whether the document is being printed on the correct
printer in order to warn the user, so rather than warn, set the correct
printer.
This might be an issue if the application uses normal.dot as a template to
create its documents as you will not want to intercept the print routines
for every document you print, so add the button and tell your users to use
it to print the document.
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Graham Mayor - Word MVP
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