IOCTL_USBPRINT_SET_PROTOCOL IOCTL (usbprint.h)
Set the current printer protocol code of the USB printer interface.
Major code
Input buffer
Pointer to a DWORD
Input buffer length
sizeof(DWORD)
Output buffer
NULL
Output buffer length
0
Status block
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.
For more information, see NTSTATUS Values.
Remarks
IOCTL_USBPRINT_SET_PROTOCOL supports the following values:
| Defined constant | Value |
|---|---|
| USB_PRINTER_PROTOCOL_BIDI | 2 |
If an interface supports IPP over USB, then it is started in the IPP over USB protocol. If the Windows print system detects that IHV drivers have been installed for the printer, then it will switch the printer back to BIDI.
Requirements
| Requirement | Value |
|---|---|
| Header | usbprint.h (include Usbprint.h) |