这个类允许你列举这台机器上所有的拨号连接器，决定目前是否有一个连接到Internet的活动的连接，以及连接到一个指定的拨号连接或从这个连接断开。包括一个示例的客户端应用程序-this category which allows you to list all the machinery for the dial-up connection, the decision whether there is a link to the Internet activities of connections and connect to a specified dial-up connection or disconnection from the link. Examples include a client application procedures