Information about BIDI capabilities of the port, returned by the BIDI_Q_PORT command.

If the ulpszProtocol parameter in the PRTPORT data structure is returned, it will be used as the protocol converter for the given printer. If ulpszProtocol is null and ulBidiType bit 0 is clear, the spooler will attempt to fill in the protocol based on the ulpszDeviceID returned by the port driver.

typedef struct _PRTPORT {
  ULONG     flBidiCapabilities;  /*  Defines printer capabilities of the port. */
  ULONG     flBidiProtocol;      /*  BIDI software protocol types supported. */
  ULONG     ulPortType;          /*  Medium used to communicate with the printer. */
  ULONG     ulpszProtocol;       /*  Offset to the name of the default BIDI protocol to be used for this printer. */
  ULONG     ulpszDeviceID;       /*  Device identifier returned by the printer hardware, as defined by the P1284 specification. */
  ULONG     ulBidiLevel;         /*  Version level of the protocol type being used. */
  ULONG     flPrinterStatus;     /*  Current status of the attached printer. */
  ULONG     ulAdapterLevel;      /*  Level of protocol used by the adapter. */
  ULONG     ulMaxSendSize;       /*  Port driver's maximum send packet size for messages or data to the printer. */
  ULONG     ulMaxReceiveSize;    /*  Port driver's maximum receive packet size for messages from the printer. */
  ULONG     ulMaxHeldResponses;  /*  Maximum number of printer messages held, waiting for BIDI_WAIT_ALERT to read them. */
} PRTPORT;

typedef   PRTPORT   * PPRTPORT ;