The IGameInput::FindDeviceFromId method uses a pointer to an APP_LOCAL_DEVICE_ID constant to retrieve a device based on the DeviceID.The XInputGetDeviceId function uses a pointer to an APP_LOCAL_DEVICE_ID structure to return the APP_LOCAL_DEVICE_ID for the device at a given user index.The XUserDeviceAssociationChange structure includes an APP_LOCAL_DEVICE_ID structure member.The XUserFindForDevice function uses a pointer to an APP_LOCAL_DEVICE_ID structure to retrieve a user ID for a specific device ID.A “null” APP_LOCAL_DEVICE_ID will be equal to the value of XUserNullDeviceId.