As a matter of fact, I think he actually answered the question: https://devblogs.microsoft.com/oldnewthing/?p=36423 https://devblogs.microsoft.com/oldnewthing/

As a matter of fact, I think he actually answered the question: https://devblogs.microsoft.com/oldnewthing/?p=36423 https://devblogs.microsoft.com/oldnewthing/?p=36423 “One danger of the MsgWaitForMultipleObjects function is calling it when there are already messages waiting to be processed, because MsgWaitForMultipleObjects returns only when there is a new event in the queue.“