Depends on what you want to end up with.
If you need to print lots of labels say using a Zebra Barcode Printer. Then you would use a software package that you can control using your software. I would look for "control Zebra printer using Dephi" or something like that.
If you want to add a barcode to a printed report say something that come out of a LaserJet Printer then you would look at Barcode fonts. Again look for "barcode fonts using Dephi"
DougP, MCP, A+