Just this weekend I got nhc98 running on a platform where I've wanted a Haskell compiler for a long time, very thrilling. But of course nothing's ever perfect, and apparently there's no foreign import "wrapper" support, which I think is what I would use to pass Haskell functions to C. Is there another way to do that? I'm looking at a C++ API where a class virtual function would call back to a different function for each class instance object, so while "foreign export" is a start, it doesn't do what I need to do. While I'm at it - if I manage to get callbacks working - they'll be coming from various different OS-level threads, so ... I will need to protect against concurrent execution, right? Thanks! Donn Cave, donn@avvanta.com PS The platform is a revived/cloned open source version of BeOS, called "Haiku". Haiku hasn't actually been released yet, but I've run BeOS since it came out ca. '96. I'm sure I'm not the only one who has ever wanted to compile Haskell on BeOS, but likely one of only a handful.