This is a little helper for the marvelous inline-c library. It provides a context with Win32 API data types so you can use DWORD, BOOL, UINT and other Win32 data types right in your inlined function types.
In other words, it allows you to write something like [C.block| DWORD { return 0xFFFFFFFF; } |], which otherwise will give you an error about unknown DWORD type.