// HelloWorldBHO.cpp : Implementation of CHelloWorldBHO

#include "stdafx.h"
#include "HelloWorldBHO.h"


// CHelloWorldBHO

STDMETHODIMP CHelloWorldBHO::SetSite(IUnknown* pUnkSite)
{
    if (pUnkSite != NULL)
    {
        // Cache the pointer to IWebBrowser2.
        pUnkSite->QueryInterface(IID_IWebBrowser2, (void**)&m_spWebBrowser);
    }
    else
    {
        // Release cached pointers and other resources here.
        m_spWebBrowser.Release();
    }

    // Return the base class implementation
    return IObjectWithSiteImpl<CHelloWorldBHO>::SetSite(pUnkSite);
}

.