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>>After testing I realized that I have to rewrite the entire print routine in printer commands for the Epson LQ570e in order to print a barcode on the document. On the plus side, it would mean that the users would not have to choose the printer from a dialoge. I'm sure they would like that.
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>I'm not sure why would they have to pick a printer in the first place. You could use SET PRINTER TO command to change it programmaticaly.

With this Epson, if it is not called though the Windows Print Dialog, the Win driver is bypassed, and all the specified Windows font names and sizes are ignored and the printer resorts to its' default font settings.