>>This is my first time in the forum.
>>I would like to ask for help on how to generate by code the 13th number (it is a checksum) from the first 12 numbers of an EAN13 barcode
>>This is done automatically by barcode printers. How do we do it in VFP ?
>
>Hi Edward,
>
>The check character for the UPC/EAN codes is generated by the following method:
>
> 1.Designate the rightmost character odd.
> 2.Sum all of the characters in the odd positions and multiply the result by three.
> 3.Sum all of the characters in the even positions
> 4.Add the odd and even totals from steps two and three.
> 5.Determine the smallest number that when added to the result from step four, will result in a multiple of 10. This is the check character.
>
>EAN 13 Example:
>
> Flag characters = 20
> Message characters = 0123456789
> Position = EOEOEOEOEOEO
> Sum of odd positions = 0 + 1 + 3 + 5 + 7 + 9 = 25
> Odd positions X 3 = 25 x 3 = 75
> Sum of even positions = 2 + 0 + 2 + 4 + 6 + 8 = 22
> Sum of even and odd = 75 + 22 = 97
> Check character = 3
> Tag to be encoded = 2001234567893
>
>More info available at : http://www.semiconductor.agilent.com/barcode/sg/Misc/upc.html#A1.4.2.1
Hi Jim.
Thank you very much !!!
I'll try the code and give you a feedback,Jim.
I'm very glad of this forum.
Here in the Philippines, VFP is not as popular as VB-Access
I am very glad to meet fellow VFP developers their acquaintance.
I'm glad I am not alone.