IOCTL_USB_GET_HUB_CAPABILITIES IOCTL (usbioctl.h)
The IOCTL_USB_GET_HUB_CAPABILITIES I/O control request retrieves the capabilities of a USB hub. Note This request is replaced by IOCTL_USB_GET_HUB_CAPABILITIES_EX in Windows Vista.
IOCTL_USB_GET_HUB_CAPABILITIES is a user-mode I/O control request. This request targets the USB hub device (GUID_DEVINTERFACE_USB_HUB).
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The AssociatedIrp.SystemBuffer member points to a user-allocated USB_HUB_CAPABILITIES structure that describes the hub capabilities.
Output buffer length
The Parameters.DeviceIoControl.OutputBufferLength member indicates the size, in bytes, of the output buffer in SystemBuffer. The output buffer size must be >= sizeof(USB_HUB_CAPABILITIES).
Status block
The USB stack sets Irp->IoStatus.Status to STATUS_SUCCESS if the request is successful. Otherwise, the USB stack sets Status to the appropriate error condition, such as STATUS_INVALID_PARAMETER or STATUS_INSUFFICIENT_RESOURCES.
Requirements
| Requirement | Value |
|---|---|
| Header | usbioctl.h (include Usbioctl.h) |