How to control a digital potentiometer using PCI-1200?

[James]

I want to use PCI-1200 to control a Xicor X9C103P digital potentiometer.
The procedure is as follows: If the computer detects any keystroke from
either UP or DOWN arrow keys, it send a chain of digital signals to a
digital potentionmeter to increase or decrease its resistance accordingly.
Each keystroke control the potentiometer to change a fixed amount, say,
around 500 Ohm. How to detect these keystrokes using LabVIEW and
send to digital potentiometer through PCI-1200?

Many thanks for any help