Basic question about I2C code for MCP23008

Hi, I'm new to arduino etc and I am working with an MCP23008. I'm confident I have it connected to the arduino correctly and I have the I2C address using a I2C scanner sketch.

All I want to know is how to set the pins on the MCP23008 high or low, like I would on the other arduino pins. I've read the datasheet but its a bit beyond me. I'm guessing Wire.send(something)??

Thanks!

There are a number of threads about using this chip. Do a little searching.

I did search but it appears I didn't look at the results hard enough! Found an excellent thread here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1248798025/9 Thanks