一个采用MVVM模框架设计的WPF自定义组合框控件，能够显示多个选择项。主要目的是让读者学习采用MVVM模式设计程序的思路。-A design framework using MVVM die WPF custom combo box control, can display multiple options. The main purpose is to let readers learn using MVVM pattern design ideas of the program.

采用MFC编制MVC模式之球体演示程序 在传统面向过程的程序设计中-Using MFC sphere of the MVC pattern for preparation of the demo In traditional process oriented programming

按照Broker模式的要求,实现Client,Broker,Server三种组件(设计为三个class)()