Re: import std.c.windows.windows;

[Andrej Mitrovic]

std.c.windows.windows is missing *a lot* of definitions. It also
doesn't provide aliases to ASCII/UTF16 functions like WindowsAPI does
via the Unicode flag, so you have to explicitly use e.g.
MessageBoxA/MessageBoxW instead of MessageBox. WindowsAPI is nicely
modularized, and is based on existing MinGW headers.