Documention for: usps4cb.r
Created by: swhite
Downloaded on: 16-Feb-2020
Intelligent Mail Barcode encoder
This module provides a function for using a "dll" file from the USPS
that will create the necessary encoding so that you may print one
of the new Intelligent Mail barcodes. The new barcode is not like
the old. When you use this module, you do NOT get a barcode. What
you get is a string of letters which are then printed with a barcode
font. THAT is what produces the new barcode. You can not manually
translate a zip code into the encoding string. There is a lot of
calculation behind the scenes.
Make sure that the file usps4cb.dll is in the same directory as your
program. Then load this module:
When you load the module as shown above, the result will be a function
that you may call to encode a zip code for printing. As part of
the loading process, the module also will use the library to do a
test encoding so that if anything goes wrong, you could look at the
test results to make sure that things are working correctly.
To encode a zip code, you have to know not only your zip code, but
your tracking number. This is a number you get from the USPS.
This module does not help find the values you need to encode for
anything. All it does is perform the encoding. WHAT you encode is
up to you.
When you have those numbers available, set their values in the words:
Then call the function with:
The resulting encoding will be in IMB-BARSTRING. The encoding will
be 65 characters of the letters ADTF. This encoding is what you
print, using the proper barcode font.