using sendmessage to send wm_close to another process

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I would attempt to close a (Process with) Window(s) in the following order:

  1. WM_CLOSE

  2. WM_QUIT

  3. WM_DESTROY

  4. TerminateProcess().

Just my take as I am handling (disabling) WM_CLOSE for a Window and having difficulty distinguishing between User Close and close messages send by another master task. WM_QUIT seems to resolve my problem without using a custom WM_APP_CLOSE of my own. TerminateProcess is very much a last resort unclean exit to be avoided at all costs (it may leave handles (e.g. COM etc) and memory etc unfreed).

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