Code 128 from SQL

I need a function or a SP tha codes mystring into CODE128 for barcode.
Some link?
thankshttp://www.barcodeisland.com/code128.phtml
http://www.sqlservercentral.com/col...verbarcodes.asp
Converting a string to Code 128 format also depends on your barcode
application and how it renders barcodes. Some applications use barcode
character sets, others generate it line by line using binary bit-strings.
Also Code 128 defines three modes: A, B and C. Note that many subsets of
Code 128 (UCC-128 for ASN's, etc.) exist with a specific structure that must
be followed (including special control-code characters that must be properly
placed in the barcode) to work properly.
For a general purpose Code 128, given a character string "str", you want to
generate a string like the following:
START_Character + str + checksum_digit + STOP_Character
"checcouno" <checcouno@.discussions.microsoft.com> wrote in message
news:51D50A8D-2FFD-410C-9D2C-B58255714E37@.microsoft.com...
>I need a function or a SP tha codes mystring into CODE128 for barcode.
> Some link?
> thanks