On Linux (case-sensitive filesystem) MinGW-w64 installs the header as
windows.h (lowercase) while comm.h included <Windows.h> (capital W),
causing a fatal compile error when cross-compiling for Windows.
Changed to <windows.h> which works on both Linux/MinGW-w64 and native
Windows/MSVC (Windows header includes are case-insensitive on NTFS).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
