https://github.com/CyberShadow/win32 https://code.dlang.org/packages/win32
This is a repository + dub package which tracks core.sys.windows, and makes the declarations within available to all platforms. This is useful if you need to write cross-platform applications which e.g. read/write BMP or PE files.
More details in the README: https://github.com/CyberShadow/win32#readme