No such file to load tk

Hello!

After:

require 'tk'

Answer:

<internal:lib/rubygems/custom_require>:29:in `require': no such file to
load --
tk (LoadError)
        from <internal:lib/rubygems/custom_require>:29:in `require'
        from C:/Ruby192/prog/rub_by.rb:1:in `<main>'

What is the problem?
  Please describe how all the "build" in windows?

···

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Posted via http://www.ruby-forum.com/.

Ruby 1.9.2
Windows

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Posted via http://www.ruby-forum.com/.

Have you installed Ruby with RubyInstaller? You have to enable tk
during installation, then.

-- Matma Rex