Linux vs Windows: What do programmers use.

I was woundering if it is a common theme for most "Pro" programmers to use linux. I mean a book called C;Programming I have was written on linux. So which OS is it that programmers or hackers, per say, use?

>>4
Actually Win32 datatypes are worse than I ever thought: it's OK when you hide an integer (int) into some kind of typedef (HANDLE) or something but the fact that they also hide POINTERS inside "things you don't know what they are" is fucking stupid and prevents you from debugging the code.

What I did in the end was giving some function a pointer to something without knowing it was already a pointer... I bet Bill Gates once tried to wrap a "FILE *" inside a "HFILE" to make people crazy.