- TAL Bar Code ActiveX Control
- TAL Bar Code ActiveX PLUS
- TAL Bar Code ActiveX Demo
- TAL Bar Code DLLs
- TAL Bar Code DLL Demo
- B-Coder Pro
- B-Coder Lite
When printing to lower resolution printers (particularly
some bar code label printers) there are certain settings
that you need to pay attention to. This Article will help
identify those settings and explain why they are so important.
The way that our software works is that when you print,
it generates Windows "Rectangle" API calls that
are fed to the printer driver for the particular printer
that you are printing to. It uses a high resolution mapping
mode with a resolution of 2540 dots per inch internally however
the printer driver will always convert the rectangle coordinates
to fit the resolution of the particular printer that you
are using.
In order to obtain the best results for a particular printer,
you should select values for the NarrowBarWidth property
that are integer multiples of the width of a single dot on
the printer that you are using. For example, if you are printing
to a printer that has a resolution of 200 DPI which means
that the smallest dot that it can print is 1/200 inches wide
(1/200 inches equals 5 mils or 5/1000 inch).
This means that you should use the value of 10 or 15 mils
for the NarrowBarWidth property of ActiveX the control in
order to get the best results. You should also use integer
values for the NarrowToWideRatio property as well (i.e. 2
or 3).
When you select values for the NarrowBarWidth property that
are not integer multiples of the width of the smallest dot
that your printer is capable of resolving, then the printer
driver for the printer must round the width of the bars and
spaces in the bar code to the nearest integer value (a printer
can only print whole dots). This rounding will cause your
bar codes to be rendered in a manner that may make them difficult
to read. This is especially true when printing to low resolution
printers (under 300 DPI).
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