Would like to write a couple of programs to...(but, need help/direction)

[kain144000]

Hey, Everyone,
I am interested in dev'ing a a couple of programs. One to use my WM5/6 device's keyboard (via USB & Bluetooth) in Windows XP & Vista and *nix environs, but also prior to OS boot (to access the BIOS, select boot device and OS, etc.) And, another to use my tele's mic (again, USB & Bluetooth). I'm not the most familiar w/ dev, but 'have the "why", and now 'just need the "how". Any direction would be most appreciated. BTW, I own a Sprint PPC-6700 (HTC Apache) and a Sprint Mogul by HTC (Titan).
Thanks for the s'port.