MBr>
   > Can any DosRead be unblocked by closing it's handle?
   > Also COM ports?
MBr>

  To unblock a DosRead on an unnamed pipe from another thread, you close
  the handle and DosRead will then return.

  To unblock a DosRead on a COM device from another thread, you change
  the read timeout and DosRead will then return.

  To unblock a DosRead on an *named* pipe from another thread, you close
  the handle and DosRead will then return.  You can, alternatively (I
  believe), use DosSetNPHState to change the pipe from blocking to
  non-blocking mode.

   > JdeBP <
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