// hidport.h

typedef struct _HID_DEVICE_EXTENSION {
  PDEVICE_OBJECT PhysicalDeviceObject;
  PDEVICE_OBJECT NextDeviceObject;
  PVOID          MiniDeviceExtension;
} HID_DEVICE_EXTENSION, *PHID_DEVICE_EXTENSION;
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Windows Driver Kit DDI reference (ns-hidport-_hid_device_extension)

_HID_DEVICE_EXTENSION structure

Description

The HID_DEVICE_EXTENSION structure is used by a HID minidriver as its layout for the device extension of a HIDClass device's functional device object.

Members

`PhysicalDeviceObject`

Pointer to HID device's physical device object.

`NextDeviceObject`

Pointer to the device object immediately below the functional device object in the HID device's device stack.

`MiniDeviceExtension`

Pointer to the minidriver-specific portion of the device extension.

HID_DEVICE_EXTENSION - NtDoc