Implement some WASAPI-related interfaces
FindWindowA

Function to find a window's handle by its title.
BTW, with `SW_HIDE` this is sometimes useful as a workaround for the lack of `-mwindows` in Cargo (https://github.com/rust-lang/cargo/issues/544).
Merge pull request #22 from ArtemGr/patch-1

FindWindowA
Merge pull request #20 from tomaka/mmdeviceapi

Implement some WASAPI-related interfaces
#[deriving(Copy)] all the things

Signed-off-by: Peter Atashian <retep998@gmail.com>
Add user32/MessageBox and MessageBoxEx
Merge pull request #21 from gentoo90/msgbox

Add MessageBox functions and string conversion macros