I use a program called ZP4 from

http://www.semaphorecorp.com/home/products.html

They provide a .dll and Quarterly database updates. They give sample code for VB, Foxpro, Delphi and others.
It has worked well for us for 3 years now.

There is another program for printing Post Office mailing tags and reports that we use called BM-Win Plus

http://www.hardin-soft.com/


Tevye

>>Does anyone know of a program that authenticates addresses and zip codes?
>>
>If you are working with UPS they will give you such a thing. Many other suppliers exist .. check google for zip code databases.
>
>Bob Lee