The Envelope/Labels function in all versions of Word already does that.
Select the address and click the command.

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> I want to have a button on a template created letter that will
> generate a printed envelope with the same address as in the letter.
> I would also want the button to not print on the printed copy of the
> letter.
>
> Thanks