IOCTL_USBPRINT_GET_PROTOCOL IOCTL (usbprint.h)

Retrieve the current printer protocol code of the USB printer interface.

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

NULL

Input buffer length

0

Output buffer

Pointer to a DWORD

Output buffer length

sizeof(DWORD)

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_GET_PROTOCOL returns one of the following values:

Requirements