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Firing events from within unmanaged code into a managed wrapper

P: n/a
Sorry to be a pain in the neck managed vc++ newbie but Im having real
problems working through this problem. Its been a few years since ive
done any serious work in C++ and MFC and I cant seem to remember
anything relevant to my problem!

I have a managed wrapper class NetWriter that has a member of type
CNetWriter (the unmanaged class). What i want to do is for the
CNetWriter to signal to the NetWriter class in some manner (i was
thinking by invoking a method through a pointer? is this possible
somehow?) so that i can then place this in a managed event and fire it
off in C# or someother managed language.

Any ideas?

Thanks a lot
Nov 16 '05 #1
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1 Reply

P: 1
Hi Kieran

This is possible. You can have the unmanaged class take a function pointer, store it, and when the time is right, invoke that function to notify whoever is listening from managed land of the event. A function pointer in managed code is a delegate, so when you're calling into the unmanaged library, you need to send it a delegate.

I've done a full write up with code here, which may be helpful.
Apr 28 '06 #2

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