pszPortName (PSZ) - input

Local port name.

Following is an example of a port name:
LPT1

phDevice (PHFILE) - output

Returned port-driver handle for the device.

pDeviceFlags (PULONG) - output

Flag returns type of device being opened.

Values are as follows:

HANDTYPE_FILE

0x0000
HANDTYPE_DEVICE
0x0001
HANDTYPE_PIPE
0x0002
HANDTYPE_LPTDEVICE
0x0004
HANDTYPE_COMDEVICE
0x0008
HANDTYPE_NETWORK
0x8000

pPrtOpenStruct (PVOID) - input

Pointer to a parameter structure that describes the job being sent to the print device.

Some fields may be derived from the DevOpenDC() parameter DEVOPENSTRUC. See Data Types for details on the PRTOPENSTRUCT0 data structure.

rc (ULONG) - returns

Return codes.
• Success

• ERROR_ACCESS_DENIED)
  Not authorized to open printer port.
  8(ERROR_NOT_ENOUGH_MEMORY)
  Not enough memory to satisfy request.
  29(ERROR_WRITE_FAULT)
  Failure attempting to write to the device. This could happen if a BIDI_START_JOB bracket is sent during open time, and the print device does not accept the start job command.
  87(ERROR_INVALID_PARAMETER)
  An invalid parameter was specified; most likely an invalid pointer was passed to PrtOpen.
  99(ERROR_DEVICE_IN_USE)
  Device is in use by another application.
  240(ERROR_VC_DISCONNECTED)
  Unable to connect to the remote printer.

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