IOCTL_INTERNAL_PARALLEL_PORT_ALLOCATE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// parallel.h

// CTL_CODE(0x0016, 0x00b, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_INTERNAL_PARALLEL_PORT_ALLOCATE 0x0016002C
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ni-parallel-ioctl_internal_parallel_port_allocate)

IOCTL_INTERNAL_PARALLEL_PORT_ALLOCATE IOCTL

Major Code:

IRP_MJ_DEVICE_CONTROL

Description

The IOCTL_INTERNAL_PARALLEL_PORT_ALLOCATE request allocates a parallel port for exclusive access by a client. Before accessing port hardware, a client must first allocate it.

For more information, see Synchronizing the Use of a ParallelPort.

Parameters

Major code

IRP_MJ_INTERNAL_DEVICE_CONTROL

Input buffer

None.

Input buffer length

None.

Output buffer

None.

Output buffer length

None.

Input/output buffer

Input/output buffer length

Status block

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.

See also

IOCTL_INTERNAL_PARALLEL_PORT_FREE

View the official Windows Driver Kit DDI reference

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