Microsoft Windows是微软公司推出的一个应用于微机上的具有图形用户界面的多任务和多窗口的操作系统。Windows应用程序也称为窗口应用程序，所有的窗口应用程序都有着相同的窗口风格和菜单结构，用户界面友好，方便用户操作。本章从剖析窗口应用程序的基本结构入手，继而介绍使用MFC类库开发的应用程序框架结构，并介绍窗口应用程序运行的核心机制－消息映射。学习了本章，你将对MFC应用程序框架结构和运行机制有个整体的了解，为后面进入窗口应用程序开发打下良好的基础。　-Microsoft Windows is the operating system Microsoft launched an applied computer with a graphical user interface, multi-tasking and multi-window. Windows applications, also known as the application of the window, all windows applications have the same style of window and menu structure, user-friendly interface, user-friendly operation. This chapter from start profiling the basic structure of the application window, and then introduced the MFC class library application development framework structure, and describes the core mechanism- message map window applications running. Learning of this chapter, you have a whole understanding of MFC application framework structure and operational mechanism will lay a good foundation for application development into the window behind.