Chapter 23: Termination Handlers（2）Understanding Termination Handlers by Example（6）

最新推荐文章于 2020-12-14 11:23:36 发布

最新推荐文章于 2020-12-14 11:23:36 发布 · 134 阅读

本文介绍了一个名为SEHTerm的应用程序，该程序通过演示如何处理内存访问错误来展示终止处理程序的工作原理。当运行此应用程序时，它会询问用户是否允许进行无效内存访问，并展示了不同路径下的程序行为。

The SEH Termination Sample Application

The SEHTerm application, 23-SEHTerm.exe, demonstrates how termination handlers work. The source code and resource files for the application are in the 23-SEHTerm directory on the companion content Web page.

When you run the application, the primary thread enters a try block. Inside this try block, the following message box is displayed:

This message box asks whether you want the program to access an invalid byte in memory. (Most applications aren't as considerate as this; they usually just access invalid memory without asking.) Let's examine what happens if you click the No button. In this case, the thread naturally flows out of the try block and enters the finally block that displays a message box: