IOCTL_USB_UNREGISTER_FOR_TRANSPORT_CHARACTERISTICS_CHANGE IOCTL (usbioctl.h)
This request unregisters the caller from getting notifications about transport characteristics changes.
Major code
Input buffer
A pointer to a USB_TRANSPORT_CHARACTERISTICS_CHANGE_UNREGISTRATION structure that contains the registration handle previously received by the IOCTL_USB_REGISTER_FOR_TRANSPORT_CHARACTERISTICS_CHANGE request.
Input buffer length
The size of the USB_TRANSPORT_CHARACTERISTICS_CHANGE_UNREGISTRATION structure.
Status block
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status indicates the appropriate error condition as a NTSTATUS code.
Remarks
After this request completes the registration handle is considered to be stale and requests sent on that handle are failed by the USB driver stack.
Requirements
| Requirement | Value |
|---|---|
| Header | usbioctl.h |
| IRQL | <=DISPATCH_LEVEL |
See also
Creating IOCTL Requests in Drivers
USB client drivers for Media-Agnostic (MA-USB)
WdfIoTargetSendInternalIoctlOthersSynchronously
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