Hi Geni,
As far as I'm aware all you have to do is select the Acrobat Writer as the default printer and then just print as you would normally have done to the physical printer. Doesn't that work for you?
Here's another thread that talks about how to use Acrobat Writer to print a VI programmatically. Is that something you can use?
Have fun!
- Philip Courtois, Thinkbot Solutions