基于Winsock2的支持断点续传和SOCKS代理的HTTP下载类，支持断点续传和HTPPGET、SOCKS4、SOCKS4A、SOCKS5代理协议， 支持HTTP BASIC验证和PROXY验证，同时提供SOCKS函数库和基于WINSOCK2重叠IO和事件 对象的Winsock2函数库。-based Winsock2 support HTTP and SOCKS Agent HTTP download categories, support and HTPPGET HTTP, SOCKS4, SOCKS4A, SOCKS5 agency agreement to support HTTP PROXY BASIC authentication and certification, along with libraries and SOCKS-based IO WINSOCK2 overlapping objects and events, the Winsock2 libraries.