>> ...
>>Have you entered the font codes in the "Font" tab of the
>>windows printer driver properties?
>
>I did notice that, but what if I don't know which printer will be used?
> Or, what if they suddenly buy new printers?
>
>I'm looking for a solution as "generic" as possible.

As far as I know there is no way around that. You need to enter
specific printer codes. However..., you could probably create
two printer drivers - many printers can use either
the IBM or Epson driver codes - and they can try one or the other.
The files containing the generic printer driver are tty.drv and tty.hlp
and are in the Windows/system folder.