IOCTL_POINT_OF_SERVICE_RETAIN_DEVICE - NtDoc

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

// CTL_CODE(0x0054, 0x005, METHOD_BUFFERED, FILE_WRITE_ACCESS)
#define IOCTL_POINT_OF_SERVICE_RETAIN_DEVICE 0x00548014
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ni-pointofservicedriverinterface-ioctl_point_of_service_retain_device)

IOCTL_POINT_OF_SERVICE_RETAIN_DEVICE IOCTL

Description

This I/O control function is used to keep a claim on a device when a client is notified that its claim on the device is being contested by another client.

Parameters

Major code

Input buffer

Not used with this operation; set to NULL.

Input buffer length

Not used with this operation; set to 0 (zero).

Output buffer

Not used with this operation; set to NULL.

Output buffer length

Not used with this operation; set to 0 (zero)

Input/output buffer

Input/output buffer length

Status block

Returns TRUE if successful; otherwise, returns FALSE.

Remarks

To get extended error information, call GetLastError. The following list shows common error values:

This IOCTL only works if the client has previously called IOCTL_POINT_OF_SERVICE_CLAIM_DEVICE.

When handling this IOCTL, the driver can call PosCxRetainDevice. The driver writer does not need to handle claim contention because the PosCx library determines who gets the claim.

View the official Windows Driver Kit DDI reference

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