On Thu, 27 Aug 2009, Pritpal Bedi wrote:
Hi,
> > error is 0x80040200 (CONNECT_E_NOCONNECTION), MSDN says:
> > "CONNECT_E_NOCONNECTION Error
> > The CONNECT_E_NOCONNECTION error is returned when AtlAdvise() calls the
> > IConnectionPointContainer::FindConnectionPoint() method and fails. The ATL
> > implementation of the IConnectionPointContainerImpl::FindConnectionPoint()
> > function looks in the connection point map for the event interface and
> > returns
> > this error if it doesn't find it."
> Now I remember why I used another appproach to detect the
> Connection Point in GTWVG. I believe some OLE's are misaligned
> ( I have few ) which do not confirm to FindConnectionPoint() method.
> I had to enumerate all entry points and then Advise() if one is matching.
> I struggled onto this point so many days.
> Mindaugas is the right person to extend on this subject.
Looking at the code I see one important difference between our new AX
code and GTWVG/HWGUI.
New AX code calls
lOleError = HB_VTBL( pCPC )->FindConnectionPoint( HB_THIS_( pCPC )
HB_ID_REF( IID_IDispatch ), &pCP );
to take connection point but GTWVG and HWGUI use different method.
They make sth like:
IEnumConnectionPoints* pEnumCPs = NULL;
IID rriid = IID_IUnknown;
lOleError = HB_VTBL( pCPC )->EnumConnectionPoints( HB_THIS_( pCPC )
&pEnumCPs );
if( lOleError == S_OK )
{
do
{
lOleError = HB_VTBL( pEnumCPs )->Next( HB_THIS_( pEnumCPs ) 1,
&pCP, NULL );
if( lOleError == S_OK )
{
lOleError = HB_VTBL( pCP )->GetConnectionInterface(
HB_THIS_( pCP ) &rriid );
if( lOleError == S_OK )
break;
}
}
while( lOleError == S_OK );
HB_VTBL( pEnumCPs )->Release( HB_THIS( pEnumCPs ) );
}
and they store rriid inside own OLE structure so it cean be used in
QueryInterface() method, i.e.:
static HRESULT STDMETHODCALLTYPE QueryInterface( IDispatch* lpThis,
REFIID riid, void** ppRet )
{
if( IsEqualIID( riid, HB_ID_REF( IID_IUnknown ) ) ||
IsEqualIID( riid, HB_ID_REF( IID_IDispatch ) ) ||
IsEqualIID( riid, HB_ID_REF( ( ( ISink* ) lpThis )->rriid ) ) )
{
*ppRet = ( void* ) lpThis;
HB_VTBL( lpThis )->AddRef( HB_THIS( lpThis ) );
return S_OK;
}
*ppRet = NULL;
return E_NOINTERFACE;
}
I can add such method to our new AX code if FindConnectionPoint() fails.
Anyhow I would like to ask Mindaugas to accept it and you and Alex to make
tests.
best regards,
Przemek
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