Barcode generating routine?

Dear all:

Does anyone know where i can find any PASCAL routine for generating
barcodes and print them to any printer?

If there is no such freeware / shareware, can i ask where i can find any
information relating to generating barcode and barcode standard?

Thanks in advance for any information.
Best wishes,

John Ho. (100311,3...@compuserve.com)

P.S. please email me, thank you!