第5 章: Windows Message Mapping 2008-01-11 09:04 207人阅读 评论(0) 收藏

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.