全书收录了五大类函数：窗口管理、图形设备接口、系统服务、国际特性以及网络服务。所有函数均附有功能说明、参数说明、返回值说明、备注以及引用说明。另外，在本书的第一章，我们对WiN32 API函数作了完整的概述；在附录部分，讲解了如何在Visual Basic和Delphi中对其调用。

-The book includes five major functions: window management, graphics device interface, system services, international properties, as well as network services. All functions are accompanied by functional descr iption, parameters that return values that indicate Remarks and references. In addition, the first chapter of this book, we made a complete WiN32 API function overview　in the appendix to explain how Visual Basic and Delphi to its call.