MFC发送消息到MAIN线程（而不是窗口）？ [英] MFC Send message to MAIN thread (rather than a window)?

问题描述

我正在使用MFC和C ++为Windows编写GUI应用程序。

所以我需要从我的工作线程发送消息到我的MAIN线程，告诉它更新我的GUI。但是我不知道如何发送消息到实际的MAIN线程，而不是一个窗口。因为它是我可以看到它是在MAIN线程当它收到消息，但我不知道如果这是保证或只是运气。

在工人：










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这是否意味着

解决方案

线程ID，通过在主线程中使用 threadId = GetCurrentThreadId（）; ，然后通过调用 PostThreadMessage（threadId，...） 从您的工作者线程。

- > 这里 < - ，您应避免使用 PostThreadMessage 向UI线程发送消息，应该更好地发送消息到其窗口。

I'm writing a GUI application for Windows using MFC and C++.

So I need to send messages to my MAIN thread from my worker thread to tell it to update my GUI. However I'm not sure how to send a message to the actual MAIN thread rather than a Window. As it is I can see it is in the MAIN thread when it receives the message but I am not sure if this is guaranteed or just luck.

In worker: PostMessage( *myTestToolDlg, WM_YOU_HAVE_DATA,UPDATE_GUI, 0 );

In application window: LRESULT CTestToolDlg::OnData(WPARAM wp, LPARAM )

Does this somehow mean the that

解决方案

You can get your main thread's thread id by using something like threadId = GetCurrentThreadId(); in the main thread, and then send a message to it by calling PostThreadMessage(threadId, ...) from your worker thread.

However, as Hans Passant said -> here <-, you should avoid using PostThreadMessage to send messages to UI threads, and should better send messages to its window.

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