使用ENDSESSION_CLOSEAPP和wParam == FALSE对WM_ENDSESSION的正确响应是什么? [英] What's the proper response to WM_ENDSESSION with ENDSESSION_CLOSEAPP and wParam == FALSE?

问题描述

根据 WM_ENDESSION 文档，当lParam为ENDSESSION_CLOSEAPP而wParam为FALSE时，应用程序应不关闭".

According to the WM_ENDESSION docs, when lParam is ENDSESSION_CLOSEAPP and wParam is FALSE, "the application should not shut down".

• 因此，我应该忽略它并使用默认响应吗?
• 目的是什么?

(我正在听Qt(C ++)中的Windows事件/消息以关闭一些已启动的进程，但这只是上下文，在这里不应该有任何影响...)

(I'm listening to Windows events/messages in Qt (C++) to shutdown some launched processes, but that's just the context and shouldn't have any bearing here...)

推荐答案

是的，带有wParam==false的WM_ENDSESSION仅用于提供信息.在收到此信息之前，您的应用程序将收到WM_QUERYENDSESSION.如果您为响应WM_QUERYENDSESSION做好了准备关闭的准备，则当/如果您收到带有wParam=false的WM_ENDSESSION，则可以取消该操作.如果您尚未采取任何措施开始关闭，则只需返回0即可.

Yes, a WM_ENDSESSION with wParam==false is simply for information. Prior to receiving this, your application will have received a WM_QUERYENDSESSION. If you did something to get ready to shut down in response to the WM_QUERYENDSESSION, you can un-do it when/if you received a WM_ENDSESSION with wParam=false. If you haven't taken any steps to start shutting down, you can just return 0.

这篇关于使用ENDSESSION_CLOSEAPP和wParam == FALSE对WM_ENDSESSION的正确响应是什么?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！