我已经写了一个简单的bho。
目的是知道浏览器的滚动条是否滚动。
DISPID_DOCUMENTCOMPLETE事件可以获取。
DISPID_HTMLWINDOWEVENTS2_ONSCROLL 事件不能获得。
class部分:
class ATL_NO_VTABLE Chellobho :
public CComObjectRootEx,
public CComCoClass,
public IObjectWithSiteImpl,
public IDispatchImpl,
public IDispEventImpl,
public IDispEventImpl
注册部分:
BEGIN_SINK_MAP(Chellobho)
SINK_ENTRY_EX(1, DIID_DWebBrowserEvents2, DISPID_DOCUMENTCOMPLETE, OnDocumentComplete)
SINK_ENTRY_EX(3, DIID_HTMLWindowEvents2, DISPID_HTMLWINDOWEVENTS2_ONSCROLL, OnScroll)
END_SINK_MAP()
SetSite函数:
STDMETHODIMP Chellobho::SetSite(IUnknown* pUnkSite)
{
MessageBox( NULL, L"SetSite", L"SetSite", MB_OK );
IDispatch *pDisp2;
CComQIPtr spHTML2;
CComPtr htmlWindow;
if (pUnkSite != NULL)
{
// Cache the pointer to IWebBrowser2.
HRESULT hr = pUnkSite->QueryInterface(IID_IWebBrowser2, (void **)&m_spWebBrowser);
if (SUCCEEDED(hr))
{
hr = IDispEventSimpleImpl<1,Chellobho,&DIID_DWebBrowserEvents2>::DispEventAdvise(m_spWebBrowser);
hr = m_spWebBrowser->get_Document(&pDisp2);
//test
spHTML2 = pDisp2;
if ( spHTML2 ) {
spHTML2->get_parentWindow(&htmlWindow);
hr = IDispEventSimpleImpl<3,Chellobho,&DIID_HTMLWindowEvents2>::DispEventAdvise(htmlWindow);
if (SUCCEEDED(hr))
{
m_fAdvised = TRUE;
}
}
}
}
else
{
// Unregister event sink.
if (m_fAdvised)
{
IDispEventSimpleImpl<1,Chellobho,&DIID_DWebBrowserEvents2>::DispEventUnadvise(m_spWebBrowser);
IDispEventSimpleImpl<3,Chellobho,&DIID_HTMLWindowEvents2>::DispEventUnadvise(htmlWindow);
m_fAdvised = FALSE;
}
// Release cached pointers and other resources here.
m_spWebBrowser.Release();
}
// Call base class implementation.
return IObjectWithSiteImpl<Chellobho>::SetSite(pUnkSite);
}