Method QueryInterface

DuiLib/Control/UIActiveX.cpp:331–345

}

STDMETHODIMP CActiveXCtrl::QueryInterface(REFIID riid, LPVOID *ppvObject)
{
    *ppvObject = NULL;
    if( riid == IID_IUnknown )                       *ppvObject = static_cast<IOleWindow*>(this);
    else if( riid == IID_IOleClientSite )            *ppvObject = static_cast<IOleClientSite*>(this);
    else if( riid == IID_IOleInPlaceSiteWindowless ) *ppvObject = static_cast<IOleInPlaceSiteWindowless*>(this);
    else if( riid == IID_IOleInPlaceSiteEx )         *ppvObject = static_cast<IOleInPlaceSiteEx*>(this);
    else if( riid == IID_IOleInPlaceSite )           *ppvObject = static_cast<IOleInPlaceSite*>(this);
    else if( riid == IID_IOleWindow )                *ppvObject = static_cast<IOleWindow*>(this);
    else if( riid == IID_IOleControlSite )           *ppvObject = static_cast<IOleControlSite*>(this);
    else if( riid == IID_IOleContainer )             *ppvObject = static_cast<IOleContainer*>(this);
    else if( riid == IID_IObjectWithSite )           *ppvObject = static_cast<IObjectWithSite*>(this);
    if( *ppvObject != NULL ) AddRef();
    return *ppvObject == NULL ? E_NOINTERFACE : S_OK;
}

STDMETHODIMP_(ULONG) CActiveXCtrl::AddRef()
{