Re: Handling DISPID_AMBIENT_DLCONTROL in IDispatch::Invoke

From:

herc <cartoper@gmail.com>

Newsgroups:

microsoft.public.vc.atl

Date:

27 May 2007 11:27:16 -0700

Message-ID:

<1180290436.110847.221800@p77g2000hsh.googlegroups.com>

On May 27, 9:50 am, "Igor Tandetnik" <itandet...@mvps.org> wrote:

You don't need an explicit IUnknown entry. IDispatch one is sufficient.
It's harmless though.

Brain fart, I knew that;)

I am trying to set the user-agent, the question is, how exactly do I
do that? The pVarResult is NULL

Are you sure pVarResult is NULL? That would be most unusual. I find it
hard to believe, no offense intended. pVarResult is not supposed to be
NULL, and you are supposed to pack your return value into it. Are you
sure you are not looking at the contents of pVarResult variant, but at
pVarResult pointer itself?

You *ARE* the man! THANK YOU!!!!!!!!! I misinterpret the work
"Empty" in the DS2005 debugger for NULL. Sometime I just need to be
hit upside the head;)

Over the years many I have searched for answers to my questions and
often your replies are the ones that solve them! It was actually a
reply of yours to a Alex Blekhman's question "How to respond to
DISPID_AMBIENT_DLCONTROL using CAxWindow?" that got me to upgrade the
project from VC6 to VC8. One thing you referenced in that thread is
the ability to create the host window before creating the control, so
that it is possible to get the custom IDispatch object wired up
first. I thought I was doing correctly, but the User-Agent is not
getting changed and the custom IDispatch does not get called until
leaving the WM_CREATE handler. Here is the contents of the WM_CREATE
handler:

LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL&
bHandled)
{
    CComPtr<IAxWinHostWindow> spAxWindow;
    CComPtr<IAxWinAmbientDispatchEx> spAxWinAmbient;
    CComQIPtr<IDispatch> spDispatch;

    RECT rect;
    GetClientRect(&rect);

    // Create the host window for the WebBrowser control
    m_axBrowser.Create(m_hWnd, rect, 0, WS_CHILD|WS_VISIBLE, 0,
ID_WEBBROWSER);

    HRESULT hr = S_OK;

    //------------------------------------------------------------
    // Get the ambient property interface
    hr = m_axBrowser.QueryHost(&spAxWinAmbient);
    // Create the custom IDispatch object
    CComObject<CAmbientDispatch>* spAmbientDispatch = NULL;
    hr =
CComObject<CAmbientDispatch>::CreateInstance(&spAmbientDispatch);
    spDispatch = spAmbientDispatch;
    // Set the custom IDispatch object
    hr = spAxWinAmbient->SetAmbientDispatch(spDispatch);

    //------------------------------------------------------------
    // Get the IAxWinHostWindow interface to create the WebBrowser
Control
    hr = m_axBrowser.QueryHost(&spAxWindow);
    // Create the control in the Host window
    LPOLESTR pszName = OLESTR("Shell.Explorer");
    hr = spAxWindow->CreateControl(pszName, m_axBrowser.m_hWnd, NULL);
    // Get the IWebBrowser2 inteface from the host window
    hr = spAxWindow->QueryControl(__uuidof(IWebBrowser2),
reinterpret_cast<void**>(&m_spWebBrowser));
    // Set the inital web site
    hr = m_spWebBrowser->Navigate(CComBSTR(L"http://www.google.com"),
NULL, NULL, NULL, NULL);
    hr = AtlAdviseSinkMap(this, true);

    return (SUCCEEDED(hr) ? 0 : 1);
}

Cartoper