Before You Begin - Set the Form Length
Programmers tend not to trust form feeds and sometimes use line feeds instead to move from one form to another. If there is any advantage to that approach, it is that the vertical move will not depend on the current form length. When printing bar codes on labels, you can greatly simplify your task by setting a form length that exactly matches the length of your physical form and then using form feeds to make vertical moves between labels or rows of labels.
If you print nothing but text, then the vertical position following each line feed lies on a grid that is evenly spaced according to the line feed increment. If you print a bar code symbol, then positions established by subsequent line feeds may not be on that grid. The vertical position following a bar code symbol becomes the origin for a subsequent line feed; this new origin must be computed based on bar code height, and the status of the
If you do not initialize your vertical position with a form feed for each row of labels, then printed objects may creep cumulatively up or down with respect to the top of your physical form.
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Copyright © 2004 TallyGenicom | Chapter 3 ANSI Bar Codes |
