Lets you add HANDLEs to the event loop. Not meant to be used for async I/O per se, but for other handles (it can only handle a few handles at a time.) Only works on certain types of handles! See: https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-msgwaitformultipleobjectsex
See Implementation
Lets you add HANDLEs to the event loop. Not meant to be used for async I/O per se, but for other handles (it can only handle a few handles at a time.) Only works on certain types of handles! See: https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-msgwaitformultipleobjectsex