Newbie w/digipot problems

I am trying to get an MCP4151 Digipot to increment and decriment. I have read the datasheet and found that both sections are identical. I have tried getting in touch w/Microchip, and no one there ( not even the sales staff ) can be contacted. Does anyone know how to increment or decrement this chip.

try searching on the web, quite a few examples. This may get you going Digital Potentiometer Tutorial Arduino MCP4131 DAC Raspberry Pi - YouTube you communicate via spi bus, sending values between 0 and 128, the guy explains it pretty well.

there is an arduino library to those...