I already posted my problem here http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D.learn&article_id=11610

To be brief, pointer to C++ function member is mandatory for signal programming between C++ and D.

I know Walter has a lot of work but i think this is a small task because   D 2.0 already have the interoperability with C++.