IOCTL_INTERNAL_GET_PARALLEL_PORT_INFO IOCTL

The IOCTL_INTERNAL_GET_PARALLEL_PORT_INFO request returns information about a parallel port. The information specifies the resources assigned to the parallel port, the capabilities of the port, and pointers to parallel port callback routines.

For more information, see Obtaining Information About a ParallelPort.

Major Code

IRP_MJ_DEVICE_CONTROL

Input Buffer

A PARALLEL_PNP_INFORMATION structure.

Input Buffer Length

The Parameters.DeviceIoControl.OutputBufferLength member is set to the size, in bytes, of a PARALLEL_PORT_INFORMATION structure.

Output Buffer

The AssociatedIrp.SystemBuffer member points to a PARALLEL_PNP_INFORMATION structure that the client allocates to output the parallel port information.

Output Buffer Length

The size of a PARALLEL_PNP_INFORMATION structure.

Status Block

If this request succeeds, the Information member is set to the size, in bytes, of a PARALLEL_PNP_INFORMATION structure. Otherwise, the Information member is set to zero.

The Status member is set to one of the generic status values returned by internal device control requests for parallel ports or to the following value:

Requirements

   
Header parallel.h (include Parallel.h)

See Also

PARALLEL_PORT_INFORMATION

IOCTL_INTERNAL_GET_MORE_PARALLEL_PORT_INFO

IOCTL_INTERNAL_GET_PARALLEL_PNP_INFO