Win32 API编程，用于中国电信互联星空拨号软件netkeeper自动拨号后退出，而网络并不中断，以节省系统开销。使用Visual C++ 6.0开发-Win32 API programming, for China Telecom ChinaVnet dial-up dial-up software automatically after netkeeper withdrew, and the network is not interrupted in order to reduce sy