Erm, isn't it \\.\a: (or "\\\\.\\a:" in string form)?
Also, you need NT,2k,XP unfortunately, and possibly (some) admin priliages? But then you can use ReadFile(), WriteFile(), etc, which is an excellent way of doing it, and makes it nice & easy to make image-based programmes.
Raw writing drive
RE:Raw writing drive
Argh, i hit the wrong button to start with, this is meant to be appended to Writing to Floppy Help. Apologies!!