屏幕取词原理与实现

The Principium and Realization of Capture Characters from Screen

文章描述了通过截获系统API,实现WindowsNT内核(包括NT、2000、XP)屏幕取词的方法。以一个屏幕取词应用的具体实现为主线,对实现屏幕取词的关键技术———截获API(APIHook)——进行了详细的分析。其中涉及的相关技术有Windows内存结构与管理、设备上下文、动态链接库和Windows挂钩等。

This paper describes a method of capturing words from screen on Windows platform(include Win NT,2000and XP)by hooking Win32API.Through implementing an application,we analyze the key technology of capturing words from screen——API Hook.The relevant technologies include Memory Structure and Management ,Device Context,Dynamic Link Library and Windows Hook.