Spurious C3707 error hooking a COM event.

[Carl Clawson]

The C++ compiler is choking on what looks like a valid dispinterface method
declaration.

I have an ATL object "A" that fires COM events, and an object "B" that
receives them. CA is attributed with event_source("c om"), and CB contains a
sink object attributed with [event_receiver( "com")].

In "B.h" I access A's declarations like this:

[emitidl(false)];
#import "A.tlb" embedded_idl, no_namespace
[emitidl(true)];

and then I try to hook the events with

__hook(_IAEvent s::Ding, src, DingFired);

When I compile B this line gives "error C3707: ...dispinterfac e method must
have a dispid." Well, it DOES have a dispid. I looked in the .tlh file and
here it is:

[id(0x1)] HRESULT Ding ( );

If I take out the emitidl statements it compiles and works fine, but then I
get redefinition errors in a client that uses both A and B with #import. I
don't want to use namespaces or maintain exclude lists in the client.

I am interested in any fix or workaround that keeps all of A's stuff from
appearing in B's type library. Back in V6 when I used separate IDL files I
happily used importlib for this reason, but the new COM event model seems to
require using #import with embedded_idl. importlib doesn't give me access to
the events.

I am using VC++.NET 7.1 (2003 version).

Thanks!
-- Carl Clawson
-- Photon Kinetics
-- (return address disguised in an obvious way)