## Presentation Device Driver Reference for OS/2

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### PRTPORT Field - ulpszProtocol

ulpszProtocol (ULONG) Offset to the name of the default BIDI protocol to be used for this printer.

This field, like all offsets in these BIDI command structures, is relative to the beginning of the buffer; 0 (zero) indicates no string.

This field overrides any default protocol converter selection. For example, a printer may support PJL, but it can be best serviced by a protocol converter other than the PJL converter shipped with OS/2. The value pointed to by this field must match the name of an installed protocol converter in order for the port driver to be able to use a protocol converter. For example, for NPAP, the value would be 'NPAP;' for PJL, the value would be ' PJL.'