IOCTL_HID_GET_DEVICE_DESCRIPTOR IOCTL

Description

The IOCTL_HID_GET_DEVICE_DESCRIPTOR request obtains a HIDClass device's HID descriptor.

For general information about HIDClass devices, see HID Collections.

Parameters

Major code

Input buffer

Parameters.DeviceIoControl.OutputBufferLength contains the length of the system-resident buffer provided at Irp->UserBuffer.

Input buffer length

The size of OutputBufferLength.

Output buffer

The HID minidriver returns the device descriptor in the user buffer at Irp->UserBuffer.

Output buffer length

The size of the device descriptor.

Input/output buffer

Input/output buffer length

Status block

HID minidrivers that carry out the I/O to the device set the following fields of Irp->IoStatus:

• Information is set to the number of bytes transferred from the device.
• Status is set to STATUS_SUCCESS if the transfer completed without error. Otherwise, it is set to an appropriate NTSTATUS error code.

HID minidrivers that call other drivers with this IRP to carry out the I/O to their device should ensure that the Information field of the status block is correct and not change the contents of the Status field.

See also

IOCTL_GET_PHYSICAL_DESCRIPTOR

IOCTL_HID_GET_DEVICE_ATTRIBUTES

IOCTL_HID_GET_REPORT_DESCRIPTOR