> How do I convert the PostNet barcodes in Word (and other Office
> packages) to the nwe 4-State Postal Barcodes?
There is no provision in any Office program to generate the new barcodes.
You'll need separate software that generates it as a graphic image.
For information about the 4-state barcode, also called OneCode, see
http://ribbs.usps.gov/onecodesolution and particularly the PDF specification
document linked there.

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Regards,
Jay Freedman
Microsoft Word MVP FAQ: http://word.mvps.org
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