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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def broadcast_change():
    '''
    Refresh the windows environment.

    .. note::
        This will only effect new processes and windows. Services will not see
        the change until the system restarts.

    Returns:
        bool: True if successful, otherwise False

    Usage:

        .. code-block:: python

            import salt.utils.win_reg
            winreg.broadcast_change()
    '''
    # https://msdn.microsoft.com/en-us/library/windows/desktop/ms644952(v=vs.85).aspx
    _, res = win32gui.SendMessageTimeout(
        win32con.HWND_BROADCAST, win32con.WM_SETTINGCHANGE, 0, 0,
        win32con.SMTO_ABORTIFHUNG, 5000)
    return not bool(res)