IOCTL_HID_ACQUIRE

Unsubscribes an event handle from receiving notifications about HID class device events.

Parameters

hDevice

Handle to the HID class device.

dwIoControlCode

IOCTL_HID_ACQUIRE

lpInBuffer

Pointer to an input buffer containing a SHiddiAcquire structure.

nInBufferSize

The length of the input buffer.

lpOutBuffer

NULL

nOutBufferSize

Not used

lpBytesReturned

A count of the total bytes returned.

lpOverlapped

NULL

Remarks

The input buffer contains a SHiddiAcquire structure which indicates a device ID and whether to acquire or unacquire the device. Since acquiring the device is now performed via the IOCTL_HID_SET_FORMAT control code, the IOCTL_HID_ACQUIRE control code should only be used to unacquire a device. The HID class driver should return an INVALID_PARAMETER error if this code is used to attempt to acquire a device.