is it possible to receive event raised from C++ dll in VB .NET?

[Guest]

I am forced to create a dll driver in eVC++, but the application in VB .NET.
The application is expected to receive message from the dll, instead of
doing a polling, I am wondering if it is possible to create an event in
the dll and set the event whenever there is message available to the
VB application. Can anyone tell me if this is feasible? And how the event
being linked between the DLL and the VB application?

Thanks.
Carl

 

[Chris Tacke, eMVP]

Yes. use CreateEvent/SetEvent in the C++ code, then P/Invoke CreateEvent
and WaitForSingleObject in your managed code. Go one further an put the
P/Invokes in a worker thread which then raises a managed event when it
receives the event and to an application it will look like the C++ DLL is
generating managed events.

-Chris