IE 9 failed to fire DISPID_ONQUIT event?

The following code is for a toolbar to revceive DWebBrowserEvents2 events from Internet Explorer. Running on IE 8 and 7, the toolbar can catch both DISPID_DOCUMENTCOMPLETE and DISPID_ONQUIT events. On IE 9, the tooblar receives only DISPID_DOCUMENTCOMPLETE, the message box "Document load complete" will show when I open IE. But the toolbar can not receive DISPID_ONQUIT, the message box for "IE CLOSE event" never appears when I close IE 9, it looks like that IE 9 does not fire DISPID_ONQUIT event. Does IE 9 forget to fire this event? Thanks for any help!

Code:

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STDMETHODIMP CMyIEToolBar::Invoke(DISPID dispidMember, REFIID riid, LCID lcid, WORD wFlags, 
                                DISPPARAMS* pDispParams, VARIANT* pvarResult, 
                                EXCEPINFO*  pExcepInfo,  UINT* puArgErr)
{
                HRESULT                lResult = S_OK;

                if (!pDispParams)
                        return E_INVALIDARG;

                switch (dispidMember)
                {

                case DISPID_DOCUMENTCOMPLETE: 
                  MessageBox(NULL, _T("Document load complete"), _T("DOCUMENT COMPLETE"),MB_OK); 
                  break; 

                case DISPID_ONQUIT:
                //case DISPID_QUIT:
                  MessageBox(NULL, _T("IE  CLOSE event"), _T("IE close"),MB_OK);
                  ManageConnection(Unadvise);
                  break; 

                default:
                  break;

                }
                return lResult;
}

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Quote:

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Originally Posted by forester

the toolbar can not receive DISPID_ONQUIT, the message box for "IE CLOSE event" never appears when I close IE 9, it looks like that IE 9 does not fire DISPID_ONQUIT event. Does IE 9 forget to fire this event?

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How do you know that? Did you try to debug? Did you try OutputDebugString instead of MessageBox? Or did you try to log your messages to text file?

I didn't try OutputDebugString, I only tried MessageBox. When I close IE 9, the message box doesn't appear. I test it on IE 7 and 8, the message box shows as expected when IE is closed.

Quote:

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Originally Posted by forester

I test it on IE 7 and 8, the message box shows as expected when IE is closed.

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This means nothing. Using MessageBox is not so good when debugging such a tender thing like app total closure.

Quote:

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Originally Posted by hongphan1995vn

em m?i vÃ*o di?n dÃ*n, xin chÃ*o các anh ch? ?!!!

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Нет, я так не думаю. :)