Comparing objects with IDispatch to get main frame only (BHO)
- by shaimagz
I don't know if anyone familiar with BHO (Browser Helper Object), but an expert in c++ can help me too.
In my BHO I want to run the OnDocumentComplete() function only on the main frame - the first container and not all the Iframes inside the current page. (an alternative is to put some code only when this is the main frame).
I can't find how to track when is it the main frame that being populated.
After searching in google I found out that each frame has "IDispatch* pDisp", and I have to compare it with a pointer to the first one.
This is the main function:
STDMETHODIMP Browsarity::SetSite(IUnknown* pUnkSite)
{
if (pUnkSite != NULL)
{
// Cache the pointer to IWebBrowser2.
HRESULT hr = pUnkSite->QueryInterface(IID_IWebBrowser2, (void **)&m_spWebBrowser);
if (SUCCEEDED(hr))
{
// Register to sink events from DWebBrowserEvents2.
hr = DispEventAdvise(m_spWebBrowser);
if (SUCCEEDED(hr))
{
m_fAdvised = TRUE;
}
}
}
else
{
// Unregister event sink.
if (m_fAdvised)
{
DispEventUnadvise(m_spWebBrowser);
m_fAdvised = FALSE;
}
// Release cached pointers and other resources here.
m_spWebBrowser.Release();
}
// Call base class implementation.
return IObjectWithSiteImpl<Browsarity>::SetSite(pUnkSite);
}
This is where I want to be aware whether its the main window(frame) or not:
void STDMETHODCALLTYPE Browsarity::OnDocumentComplete(IDispatch *pDisp, VARIANT *pvarURL)
{
// as you can see, this function get the IDispatch *pDisp which is unique to every frame.
//some code
}
I asked this question on Microsoft forum and I got an answer without explaining how to actually implement that: http://social.msdn.microsoft.com/Forums/en-US/ieextensiondevelopment/thread/7c433bfa-30d7-42db-980a-70e62640184c
