第5 章: Windows Message Mapping

  

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.