IOCTL_INTERNAL_USBFN_REGISTER_USB_STRING IOCTL (usbfnioctl.h)
The class driver sends this request to register a USB string descriptor.
Major code
IRP_MJ_INTERNAL_DEVICE_CONTROL
Input buffer
A pointer to a buffer that contains a USBFN_USB_STRING structure with the USB string descriptor.
Input buffer length
The length of the input buffer must be at least sizeof(USBFN_USB_STRING).
Output buffer
NULL.
Output buffer length
None.
Status block
If the request is successful, the USB function class extension (UFX) returns STATUS_SUCCESS, or another status value for which NT_SUCCESS(status) equals TRUE. Otherwise it returns a status value for which NT_SUCCESS(status) equals FALSE.
Remarks
This request must be sent after sending the IOCTL_INTERNAL_USBFN_ACTIVATE_USB_BUS request.
Requirements
| Requirement | Value |
|---|---|
| Header | usbfnioctl.h |