I found a post around here somewhere explaining how to install tix. Has anyone made it work on windows? I'm getting the follwing. C:\ruby\tcltk-ext052>mk_tkextlib.rb -p Tix c:/ruby/lib/ruby/1.8/tcltkextlib.rb:47:in `_eval': couldn't load library "C:/tcl 8.4.14/bin/tix84.lib": invalid argument (RuntimeError) from c:/ruby/lib/ruby/1.8/tcltkextlib.rb:47:in `_eval' from c:/ruby/lib/ruby/1.8/tcltkextlib.rb:67:in `eval' from c:/ruby/lib/ruby/1.8/tcltkextlib.rb:177:in `_load_shared_lib' from c:/ruby/lib/ruby/1.8/tcltkextlib.rb:220:in `setup_libs' from c:/ruby/lib/ruby/1.8/tcltkextlib.rb:216:in `setup_libs' from c:/ruby/lib/ruby/1.8/tcltkextlib.rb:233:in `full_load_libs' from C:/ruby/tcltk-ext052/mk_tkextlib.rb:1361:in `load_ext_library' from C:/ruby/tcltk-ext052/mk_tkextlib.rb:3001 My def file is $ext_lib_info = [ ['Tix', 'tix84.lib', ['C:/tcl8.4.14/bin']], nil ] I also tried the dll. And I tried using the full path. My ruby is 1.8.4.