pszComputerName (PSZ) - input

Name of the computer connected to the port.

This value can be NULL for a local machine.

pszPortName (PSZ) - input

Name of the port to set.

ulLevel (ULONG) - input

Level of information to set.

This must be 2.

pBuf (PVOID) - input

Buffer containing new port setting.

cbBuf (ULONG) - input

Length of buffer pointed to by pBuf, in bytes.

ulParmNum (ULONG) - input

Parameter number used to change port settings.

Parameter number must be one of the following:

Value

Description
1
PRPO_PORT_DRIVER Port driver. This will be the new port driver for the printer port.
2
PRPO_PROTOCOL_CNV
Protocol converter. This will override the values returned by BIDI_Q_PORT. The spooler will use this protocol converter when using this port in BIDI mode.
3
PRPO_MODE
BIDI mode of the port. The ULONG value pointed to by pBuf must be one of the following values:

Value

Description
1
PRPORT_AUTODETECT
Auto-detect mode. The spooler will use the results of BIDI_Q_PORT to decide if BIDI should be enabled and which protocol converter to use. This is the default.
2
PRPORT_DISABLE_BIDI
BIDI disabled. The spooler will not use the printer in BIDI mode. This overrides the port driver.
3
PRPORT_ENABLE_BIDI
BIDI enabled. This is set only if an application knows a printer is capable of using a protocol converter, but the port driver does not know which converter to use. The application must also supply the protocol converter name when setting a port to this mode.
4
PRPO_PRIORITY
Priority. Currently not supported.

rc (ULONG) - returns

Return codes.
• Success

  ERROR_INVALID_PARAMETER(87)

  An invalid parameter was specified; most likely an invalid pBuf value or an invalid ulParmNum value.
  ERROR_NOT_SUPPORTED(50)
  Command not supported on pszComputerName.
  NERR_DestNotFound(2152)
  The port name does not exist.

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