多窗口程序
我读了很多关于这个主题的文章，其中一些在 stackoverflow 上，但没有人问我的问题。我会尝试具体一点。
我需要创建一个带有主窗口（窗口类“a”）的应用程序（本机 WinAPI）。当用户单击那里的按钮时，会弹出一个“b”类窗口。它可能是模态的，也可能不是模态的，我现在不在乎。
我尝试制作一个具有两个窗口类和两个窗口过程的应用程序。但问题是，当我关闭第二个窗口时，整个应用程序都会关闭。
谢谢。
I read many articles on the topic, a few of them were here, on stackoverflow, but none of them asked my question. I'll try to be specific.
I need to create an application (native WinAPI) with a main window (of window class "a"). When the user clicks a button there, a window of "b" class pops up. It might be modal or not, I don't care right now.
I tried making an application with two window classes and two window procedures. But the problem is that when I close the second window, the whole application shuts down.
Thank you.
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据猜测，第二个窗口的窗口过程基于主窗口的窗口过程，因此当它收到
WM_DESTROY时，它会调用PostQuitMessage。这对于顶级窗口来说是正常的，因为用户期望销毁它就意味着退出应用程序。对于子窗口（模态窗口或其他窗口）而言，情况并非如此，因此子窗口不应该（同样，正常情况下）在其WM_DESTROYPostQuitMessage > 处理程序。At a guess, the window procedure for your second window is based on one for a main window, so when it receives a
WM_DESTROY, it's callingPostQuitMessage. This is normal for the top-level window, because the user expects destroying it to mean exiting the application. For a child window (modal or otherwise) that's not the case though, so the child should not (again, normally) callPostQuitMessagein itsWM_DESTROYhandler.