This a Digital Input / Output example code
for UC-7408-CE / IA261-CE / IA262-CE / V468-CE
All controls of Digital IO must be commanded
via DIO1: driver, so you have always use CreateFile
to open the driver first.
Use IOCTL_SET_DOUT and
IOCTL_GET_DOUT to set Digital output data and to get the
Digital Output data.
Use IOCTL_GET_DIN
and IOCTL_GET_DIN_ALL to get
Digital input data.
Don't forget CloseHandle command if your program left DIO control.