Re: Event notification of Simple COM Object defined on a web page
Johnson Lau <laozhongcheng@hotmail.com> wrote:
I wrote a simple COM object named IEConnector with VC7
with connection point supports and
it owns a connection point - _IEConnectorEvent.
But I only got a failure on event sinking.
I found that althought the object's classid matches
my COM componenet, and it did have a implemented interface
- IEConnector (QueryInterface returns S_OK),
it failed because it didn't have any Connection Point
- _IECommunicationEvents in the object that
I used getElementsByTagName to get.
Check that your class derives from IConnectionPointContainer (possibly
indirectly via IConnectionPointContainerImpl), that
IConnectionPointContainer is listed in the interface map, and that you
have an appropriate entry in connection point map (see
CONNECTION_POINT_ENTRY).
If all this is in place, put a breakpoint into
IConnectionPointContainerImpl::FindConnectionPoint, step through it and
try to figure out where it fails.
--
With best wishes,
Igor Tandetnik
With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925