Re: How to get handle for a windowless activex control.

From:

"Alexander Nickolov" <agnickolov@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 3 Aug 2007 15:37:12 -0700

Message-ID:

<OQq#U7h1HHA.1344@TK2MSFTNGP04.phx.gbl>

What do you need it for?

--
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD
email: agnickolov@mvps.org
MVP VC FAQ: http://vcfaq.mvps.org
=====================================

"JoDeGr8" <johnemmatty@gmail.com> wrote in message
news:1186145964.731233.142290@x35g2000prf.googlegroups.com...

Hi,
Is there any way to get the handle for the windowless activex control.
This following code will fail in the case of windowless control.

LPOLEWINDOW lpOleWnd;
   HWND docWnd = NULL;
   HRESULT hRes;

   // If the control exists with an hWnd, this call will use its
   // IOleInPlaceSite pointer to retrieve the container's IOleWindow.
   // From there, IOleWindow can be queried to retrieve the
container's
   // hWnd.

if (m_pInPlaceSite == NULL)
{
if (m_pClientSite != NULL)
{
if (FAILED(m_pClientSite->QueryInterface(IID_IOleInPlaceSite,
reinterpret_cast<void**>(&m_pInPlaceSite))))
{
m_pInPlaceSite = NULL;
}
}
else
m_pInPlaceSite = NULL;
}

   if (m_pInPlaceSite) // Should always be ok
   {
       m_pInPlaceSite->GetWindow(&docWnd);
hRes = m_pInPlaceSite->QueryInterface(IID_IOleWindow,
                                             (LPVOID *) &lpOleWnd);

       if (SUCCEEDED(hRes))
       {
           hRes = lpOleWnd->GetWindow(&docWnd);

           if (SUCCEEDED(hRes))
           {
               lpOleWnd->Release();
           }
       }
   }

Regards,
John.