I use MSMQ on Widows NT 4.0 with MS Visual C++ 6.0. I have COM object which is event handler (implements IDispEventImpl<0, CM3Server, &DIID__DMSMQEventEvents, &LIBID_MSMQ, 1, 0>) and at the same time serves as a connection point container (implements IConnectionPointContainerImpl<CM3Server>).
This COM object uses MSMQQueue COM objects, collects messages from some small number of queues (only one now), and dispatches all those messages to other COM objects which can handle them (this will be always one COM object at a time).
My problem is trivial: I send some text messages to the queue (checked, message is delivered to the queue and contains the right text) and when I read those messages asynchronously, message body is empty!!! Right type (VT_BSTR), but zero length...
Do you know the answer? .... I have headache when meditating about this - but the worst thing is that it sometimes works! When I "shootdown" server without destroying the queue and run it again, it works as it should always. When I create the queue in the same session, it still receives empty messages.
Please help, I am very unhappy about this!