IOCTL_INTERNAL_USB_GET_HUB_COUNT - NtDoc

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

// CTL_CODE(0x0022, 0x006, METHOD_NEITHER, FILE_ANY_ACCESS)
#define IOCTL_INTERNAL_USB_GET_HUB_COUNT 0x0022001B
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ni-usbioctl-ioctl_internal_usb_get_hub_count)

IOCTL_INTERNAL_USB_GET_HUB_COUNT IOCTL

Description

The IOCTL_INTERNAL_USB_GET_HUB_COUNT IOCTL is used by the USB hub driver. Do not use.

Parameters

Major code

IRP_MJ_INTERNAL_DEVICE_CONTROL

Input buffer

Input buffer length

Output buffer

Output buffer length

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful.

Otherwise, Status to the appropriate error condition as a NTSTATUS code.

For more information, see NTSTATUS Values.

View the official Windows Driver Kit DDI reference

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