HandleExternalEventActivity and events

Let's suppose I have an Interface which gives me only the events that i can bind to HEEA. With the wca.exe tool i generate the sinks for the Workflow. And til here no problem. Now I have the big question.
In a normal environment an EVENT is raised and the HANDLERS boud to it are invoked. Now I don't completely understand the HEEA architecture. It should offer me a handler (eventually emplty) which I can bind to the real event raised outside of the workflow.
As far as i can understand it is not done this way. So the question is: how can I raise my event and hope my Workflow listens to me?

Thank you

Marco

[641 byte] By [sirmmo] at [2007-12-21]