Also available is TBarcodeBmp, and TDBBarcodeBmp. TKeyboardWedge is a keyboard wedge component. TPrintBarcode from MountainTop Systems is a delphi VCL component for printing a variety of bar codes. The component is free. If you pay for it, you get the source code.
Object code is free.
There is a fee for the source code. Bar codes can be printed on any canvas and may be automatically scaled to adapt to new numbers of pixels per inch. Bar Width Ratios are varied to give best readability available. Code 128 codes are completely optimized. More information is available at the MountainTop Systems site.