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With the addition of Java Native Access (JNA) to JRuby, systems
programmers using JRuby now have greater flexibility in terms of
interfacing with underlying operating system.
Some Ruby users are familiar with the ‘Win32API’ library that ships as
part of the Ruby standard library. That library lets you interface with
the Windows API by defining function pointers from specific DLL’s that
you later call. With JRuby’s JNA interface you can now interface with
Windows in a similar fashion.
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