## Presentation Device Driver Reference for OS/2

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### PRTRESPONSE Field - usLenFieldOffset

usLenFieldOffset (USHORT) Offset from the beginning of printer-to-host messages, if bit 2 of flResponseType is set.

This value is the length field for the message. For NPAP, this would be 1 because Printer Response packets have their packet length immediately after the Start of Packet Byte 'A5.'