ZZ>
  > It would seem to make a whole lot more sense to just post a WM_QUIT to
  > every thread that has a message queue and not worry about it. I wonder
  > why this is not done? Or maybe it is done and what I have read is not
  > true.
ZZ>

  As far as I can see, both from the documentation of WinCancelShutdown
  in the PM Reference, and from other sources, every message queue is
  sent a WM_QUIT at shutdown time.

  Personally, I dislike making background threads into message loop
  threads.  I give them message queues, yes, to allow WinSendMsg to
  operate, but I believe it best to have just the one message loop, in
  the main thread.

ZZ>
  > multi-threaded PM apps could be in potential danger of having their
  > programs hang up on exit.
ZZ>

  Which is why the recommendation is never to disable WM_QUIT on the
  message queue used in the message loop for your main thread.

  > JdeBP <
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