本程序是一个关于如何检查电子邮件的数量的小程序，简单易懂。...

用C#开发的如何发送电子邮件的源码.可实现内部邮件的管理.-With C# Developed how to send e-mail source. May achieve the internal e-mail management.

C++ builder 编的发送邮件代码-C++ Builder made the send mail code

Multicast Packet Generator 多播包生成器-Multicast Packet Generator multicast packet generator

window下，固定结构格式的数据文件进行网络数据传输，经过编译，很实用 -window, the fixed structure of data file formats for network data transmission, through the compiler, it is practical

5大IO模型之一：select模型，介绍selectio的一般流程-five large IO model one : select models, introduced the general process compo

在别人基础上实现了身份验证的邮件发送,即支持esmtp规范，除了例子还有静态库，方便使用。-others on the basis of the identity of the senders, which is to support ESMTP norms, in addition to examples include static libraries, user-friendly.

类似windows的net send功能的给其他windows机器发送消息的程序，其他机器不需要安装程序也可以收到消息-A program in which message can be sent to others windows machine as like windows`s net sending function , and other machines can receive messages without installing this program

同步套接字服务器-synchronization socket server

hmac是一种消息验证码，我开发的这个程序可以进行任意长度的消息验证。该程序代码可以用来防止文件篡改，可以适当修改输入密码。-HMAC is a message authentication code, I developed this procedure can be of arbitrary length message authentication. The program code can be used to prevent document tampering, with appropriate modifications can enter a password.

可以清晰了解TCP/IP，UPD协议中，每个包所包含数据的含义等，包括每一帧数据的头，校验等，解码的数据让你清晰了解底层通讯的机制。非常珍贵。