iphlper.dll中两个函数
1 GetIfTable()获得所有的网卡列表
2 SetIfEntry()将指定的网卡启用或禁用
(Updates a specific adapter's operating status,
such as describing whether an interface is up, down, or in a testing mode. )
详见http://support.microsoft.com/default.aspx?scid=KB;EN-US;q193059&
不过我不知道的d6中怎么用