def release(self):
        """Relase an acquired mutex. Raises WindowsError on error."""
        ret = _ReleaseMutex(self.handle)
        if not ret:
            raise ctypes.WinError()
        self.acquired = False
Relase an acquired mutex. Raises WindowsError on error.
recipes/Python/577794_Win32_named_mutex_class_systemwide/recipe-577794.py