If you wish to add a prefix to your barcode then this would be passed into PARM1. The barcode passed in PARM2 will then be left justified (leading blanks and zeros removed). The formatted barcode returned will be in the correct format for the Cobwebb Designer e.g.

¶CAZZZZNNNN

where:

 ¶C        Are the special characters used by PPD to denote a barcode

A        Barcode type (PARM3)

ZZZZ        Barcode prefix (PARM1)

NNNN        Barcode (PARM2) left justified with leading blanks and zeros removed