This structure stores the root hub's symbolic device name.
typedef struct _USB_ROOT_HUB_NAME { ULONG ActualLength; WCHAR RootHubName[1]; } USB_ROOT_HUB_NAME, *PUSB_ROOT_HUB_NAME;
Declared in usbioctl.h. Include usbioctl.h.
IOCTL_INTERNAL_USB_GET_HUB_NAME