Is there a trick to using FFI and the non-windows api dll's?  I am
attempting to link to a custom usb dll that is known to work
(currently using wrapper created from swig and using ruby 1.8.6).  I
am now attempting to run ruby 1.9.2 and FFI seemed like a simpler
solution than worrying about using swig.  I should also note that I am
on windows 7 and ran the ruby one click installer for windows.  When
running the script I get this error:


C:/projects/FFI/test_usb.rb:6: [BUG] Segmentation fault
ruby 1.9.2p0 (2010-08-18) [i386-mingw32]

-- control frame ----------
c:0004 p:---- s:0014 b:0014 l:000013 d:000013 CFUNC  :Receive
c:0003 p:0081 s:0009 b:0008 l:0013f4 d:001074 EVAL   C:/projects/FFI/
test_usb.rb:6
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:0013f4 d:0013f4 TOP
---------------------------
-- Ruby level backtrace information
----------------------------------------
C:/projects/FFI/test_usb.rb:6:in `<main>'
C:/projects/FFI/test_usb.rb:6:in `Receive'

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension
libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html


This application has requested the Runtime to terminate it in an
unusual way.
Please contact the application's support team for more information.

Any advice?
If you need more information let me know.

Thanks