How can I get this combination to work?

I've got an VB ActiveX DLL which sources events. I want to
sink these events into a C++ ATL DLL and I can't seem to
get this combination to work.

I think the VB ActiveX DLL is working properly, because I
can sink these same events into other VB ActiveX DLLs or
VB ActiveX EXEs.

Thank you.

See

http://msdn.microsoft.com/library/en-us/vcmfc98/html/vcconusingidispe...
http://msdn.microsoft.com/library/en-us/vcsample98/html/vcrefatlevent...

VB ActiveX should not be any different from any other ActiveX. You
#import its type library and build the sink with IDispEventImpl.
--
With best wishes,
    Igor Tandetnik

"For every complex problem, there is a solution that is simple, neat,
and wrong." H.L. Mencken

Yes, that's what I thought too.

A VB ActiveX DLL should not be any different than sinking events from any
other ActiveX DLL.

But you know, there don't seem to be any code samples available that use
this specific combination: an event source written as a VB ActiveX DLL and
an event sink written as a C++ ATL DLL. (I've even tried writing the sink as
a C++ ATL EXE, but no luck).

I have already sucessfully duplicated the event code related parts of this
VB ActiveX DLL as a C++ ATL DLL and I can sink those events all day into VB
ActiveX DLLs, VB ActiveX Exes, C++ ATL DLLs, and C++ ATL EXEs.

There must be some special trick to get the specific combination I'm trying
to use to work properly.

It seems that if the event source is written as C++ ATL code, there's no
trouble sinking those event into anything else.

Yet, if the event source is written as a VB ActiveX DLL, the only
combination I can get to work is a sink written as a VB ActiveX DLL or EXE.

Any other ideas would be welcome.

Thank you.

http://msdn.microsoft.com/library/en-us/vcmfc98/html/vcconusingidispe...
http://msdn.microsoft.com/library/en-us/vcsample98/html/vcrefatlevent...

EXE.

What specifically do you have problems with? Which part does not work as
expected?
--
With best wishes,
    Igor Tandetnik

"For every complex problem, there is a solution that is simple, neat,
and wrong." H.L. Mencken

Specifically, I can't get the events which are sourced from a VB ActiveX DLL
to sink into a C++ ATL DLL.

This is the case even though in my C++ ATL DLL the code: "hr =
DispEventAdvise(m_pServerPtr);" results in an hr = 0. It appears that the
DispEventAdvise is sucessful.

Again, if I swap out my VB ActiveX DLL with a C++ ATL DLL that sources the
same events, everything works as expected. Also, if I swap out the C++ ATL
DLL with a VB ActiveX DLL or EXE the event will sink properly. Its just the
specific combination of a VB ActiveX DLL as an event source, with either a
C++ ATL DLL or EXE that does not work properly.

There must be some technique to get this to work properly (the IDL, tlh,
tli, or some special argument to the #import command).

Thanks again for your assistance.

Show how you declare IDispEventImpl. Show your sink map. It's likely you
are misconfiguring some IID or DISPID somewhere.

Put a breakpoint on IDispEventSimpleImpl::Invoke (<atlcom.h> line 3694
in VC6). If it gets called (I expect it does), step through it and see
why it fails to call your sink.
--
With best wishes,
    Igor Tandetnik

"For every complex problem, there is a solution that is simple, neat,
and wrong." H.L. Mencken