DHTML Edit Control is an ActiveX control provided by Microsoft, they provide with it a sample app, this code is built on that app but much enhanced, to get the DHTML control goto: http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnare

Windows Sockets规范以U.C. Berkeley大学BSD UNIX中流行的Socket接口为范例定义了一套Microsoft Windows下网络编程接口。它不仅包含了人们所熟悉的Berkeley Socket风格的库函数；也包含了一组针对Windows的扩展库函数，以使程序员能充分地利用Windows消息驱动机制进行编程。 -Windows Sockets specification to the University of UC Berkeley' s BSD U