I ran some the of the tests in hugs98/tests. They still suffer from the wrong exit code, so it is hard to tell what is going on. I ran some of the tests by hand in tests/ffi, and they seem fine. There is no real hard-core marshalling in there, so I will check that out by hand later. (i have some code I wrote for work that should do the trick) So.... so far cygwin works like any unix platform except for the problem with the exit codes. I dont know what is going on there. As for MSVC, I have been using that as my main development configuration, with no problems. Nice ! I did compile it once by hand (including files), but I never bothered to fully get everything working, as the msi install works great for me. As for BCC, I don't use this anymore, so I can't say. I sold out and bought MSVC. :) Cheers! Ron