I have a Macbook Pro and installed on this is Windows via Bootcamp. Now I do a lot of programming and I can't find the hash key! Am I missing an obvious shortcut or is there a way to change the shortcuts on Windows in order to map hash to a key (alt 3, ala the Mac)
Ctrl+Alt+3. This requires Bootcamp drivers are installed.
It's the RH ALT key + 3 for # on my MBA under Win8.1 Bootcamp
I'd just like to add that I'm also programming on Windows on a Macbook, and I find AutoHotKey completely invaluable for programming shortcuts.
Quick example, if I press /' or '/ it actually gives me /* and */ which is great for commenting stuff out.
You could use AHK to setup another key to give you a # symbol.