_WIN32_WINNT       27 opal/mca/event/libevent2022/libevent/event_iocp.c #ifndef _WIN32_WINNT
_WIN32_WINNT       29 opal/mca/event/libevent2022/libevent/evthread_win32.c #ifndef _WIN32_WINNT
_WIN32_WINNT       32 opal/mca/event/libevent2022/libevent/listener.c #ifndef _WIN32_WINNT