"VisualuRuby" is a GUI library on MS Windows for Ruby. The project has two part, one is "swin" which is about ruby extension library, the other is "vruby" : a set of vr* series of ruby scripts which wrap swin. The event handling style is like that of VisualBasic.
Gemfile gem 'swin', '~> 2004.03.14'
install gem install swin