rc (ULONG) - returns

Return codes.
• Success

• ERROR_INVALID_FUNCTION
  The command code is not supported. This may occur if a new command is sent to an old spooler, port driver, or protocol converter, or if the printer rejects the command.
  2(ERROR_FILE_NOT_FOUND)
  pszDeviceName given is not a valid port name with a port driver, a printer device name, or a printer queue name.
  5(ERROR_ACCESS_DENIED)
  Not authorized to access a printer port.
  8(ERROR_NOT_ENOUGH_MEMORY)
  Not enough memory to satisfy request.
  29(ERROR_WRITE_FAULT)
  Failure attempting to write to the device. The printer might not have received the set request.
  53(ERROR_BAD_NETPATH)
  The computer name specified is not available or is invalid.
  67(ERROR_BAD_NET_NAME)
  The computer name cannot be found.
  87(ERROR_INVALID_PARAMETER)
  An invalid parameter was specified; most likely an invalid buffer pointer was given.
  117(ERROR_INVALID_CATEGORY)
  The protocol converter does not handle the category given with command BIDI_ENABLE_ALERT.
  186(ERROR_INVALID_FLAG_NUMBER)
  The protocol converter does not understand one of the core alert types set with command BIDI_ENABLE_ALERT.
  211(ERROR_INFO_NOT_AVAIL)
  The request cannot be sent with the given ulType value. The request should be reissued with a different ulType value.
  640(ERROR_TIMEOUT)
  The set command was not able to be sent to the printer within the time allotted.
  683(ERROR_BIDI_NO_SUPPORT)
  The printer is not in bidirectional mode, therefore query requests are not honored. The port may also be in the process of being shut down.
  0x1403(PMERR_ALREADY_INITIALIZED)
  The port driver has already been initialized for the port.
  0x4005(PMERR_SPL_INV_HSPL)
  Not currently in a passthru session.
  0x4009(PMERR_SPL_SPOOLER_NOT_INSTALLED)
  The spooler is not enabled, therefore bidirectional set requests are not supported.
  0x4011(PMERR_SPL_INV_JOB_ID)
  The job ID specified is not known.
  0x403D(PMERR_SPL_CNV_NOT_INIT)
  The protocol converter or port driver has not been initialized for this port.
  0x403E(PMERR_SPL_INIT_IN_PROGRESS)
  Another thread is still processing BIDI_INIT_PORTDRV or the initial BIDI_Q_PORT for the given portname. The request should be tried again later.
  Others
  If pszComputerName is specified, other network errors may be returned.
  Note: Currently, you cannot send more than 64KB of data from a spooler call over the network. Therefore, all data used in this API should be limited to less than 64KB for now.