Shows how to enumerate and hang up all existing Dial-up network (DUN) connections using the Win32 RAS API functions from VB

主要是学习RAS枚举宽带拨号的名称，并隐式拨号到宽带连接，自动枚举出宽带的账户和密码。-Enumerate the major broadband dial-up RAS to learn the name, and implicitly dial-up connection to broadband, broadband automatic enumeration of accounts and passwords.