IP地址查询，可以给个地址，查到相应的地点和其他信息

一个简单的Email收发工具-a simple tool Email TX

这是一个基于CSocket类的点对点文件传输系统。-This is a CSocket-based class system, peer-to-peer file transfer.

多线程文件下载器 显示在listbox里 轮询 从downloadlist.ini中获取要下载的文件，并且校验MD5，存储数据库，重复的不再下载-Multi-threaded file download device displayed in the listbox inside polling from downloadlist.ini get to download the file, and verify MD5, store databases, repeat no longer download

扫描局域网网端地址的程序-scan LAN network addresses in the end

FTP_Client_by_SMC.zip

获取本机ip，mac地址和时间，依次转换成16进制字符串，并连接到一起，返回的字符串可以作为数据库编程创建数据表的主键ID.-Access to the local ip, mac address and time, followed by 16 to convert hexadecimal string, and connect together, the return of the string can be used as a database programmer to create data table primary key ID.

一个用VC开发的全双工Socket通讯程序- The entire duplex Socket communication procedure which develops with VC

该算法应于求解QOP问题，本人对此不是很精通，希望有机会和大家一起讨论这个问题。-the algorithm should be solved QOP issue, I am not very proficient, and hope we have the opportunity to discuss this issue.

中点圆算法 简单精炼 特别适合初学者 希望对大家有点参考价值-Midpoint circle algorithm is simple and particularly suitable for beginners refining hope everybody a little bit reference value

用于嗅探网络数据报, 用于嗅探网络数据报-For sniffing network data reported for the sniffer network data reported