ulTimeout (ULONG) - input

      Time-out in milliseconds.

      This is the maximum amount of time the user wants to allow the thread to be blocked.

      This parameter can also have the following values:

      SEM_IMMEDIATE_RETURN (0)

        WinRequestMutexSem returns immediately without blocking the calling thread.
      SEM_INDEFINITE_WAIT (-1)
        WinRequestMutexSem blocks the calling thread indefinitely.

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