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USB_HUB_TYPE enumeration (usbioctl.h)

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The USB_HUB_TYPE enumeration defines constants that indicate the type of USB hub.

The hub type is retrieved by the IOCTL_USB_GET_HUB_INFORMATION_EX I/O control request.

The request retrieves the hub descriptor associated with the specified hub in the USB_HUB_INFORMATION_EX structure. The HubType member contains a USB_HUB_TYPE enumerator that the application can use to evaluate the type of hub descriptor retrieved by the request.

Syntax

typedef enum _USB_HUB_TYPE {
  UsbRootHub = 1,
  Usb20Hub = 2,
  Usb30Hub = 3
} USB_HUB_TYPE;

Constants

 
UsbRootHub
Indicates a root hub.
Usb20Hub
Indicates that the retrieved hub descriptor is defined in USB 2.0 and 1.1 specifications.
Usb30Hub
Indicates that the retrieved hub descriptor is defined in USB 3.0 specification.

Requirements

Requirement Value
Minimum supported client Windows 8
Minimum supported server None supported
Header usbioctl.h (include Usbioctl.h)

See also

IOCTL_USB_GET_HUB_INFORMATION_EX

USB Constants and Enumerations

USB_HUB_INFORMATION_EX