第5 章: Windows Message Mapping
いち.消息流程
◙ WM_CREATE
first message to a view . use ONCreate 无法截获. 在 OnInitalUpdate可以使用, but this function maybe use more than one time .
◙ WM_CLOSE
OnClose to close the window, use CDocument::SaveModified for safe.
◙ WM_QUERYENDSESSION
It is sure that many programs are running when you want to close the windows. So, these session must be end before the windows are closed .
And then , using WM_QUERYENDSESSION in OnQueryEndSession function.
◙ WM_DESTROY
WM_DESTROY after WM_CLOSE .->OnDestroy.
the view is visable but it and its child are still active.
-> call base OnDestroy.
◙ WM_NCDESTROY
last message before window destroyed.
child has been destroyed .
->OnNCDestroy ->base OnNCDestroy.
The 动态 view use PostNCDestroy.
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