- get latest cygwin (I'm using Flex 2.5.4 and Bison 2.3 and have tested building with vs6 and vs2005-express-edition; I've got MANY warnings regarding 64bit-support, don't know if that is problematic or not) - include the path from bison and flex into visual studio executable directory (be sure that really the new tools are used and no other bison/flex is before yours in the path!) Tools -> Options -> Directories -> Executables - hit compile, in the datadraw-executable is the "undo and persistence"-library included by default and in the project-setting exceptions are disabled. have fun PS: I've not tested the windows-version much, but it generates the graph-example so I think it's working.