Actually all bar-code printers come with bar-code designing software and a utility/tools to generate the script for the design of the bar-code. The script generated is ASCII text with ASCII code / sequence for firmware to directly print barcode on the bar-code label without any installation of utility or DLL etc.
So far all the PCs used to have Parallel port or COM port, but now new PCs come with only USB port and new bar-code printers also come with USB support only, so how to print the bar-code script through DOS command line or open command used so far.
"Open For Output As #1"
Looking for answer to my question.