Chapter 8. The FXRuby Standard Library
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## Chapter 8. The FXRuby Standard Library

While the majority of FXRuby is in fact implemented by an extension module, some parts are provided instead by "pure Ruby" code. This section describes the classes and modules available in the FXRuby standard library.

## Undoable Commands

The `fox/undolist.rb` file provides the `FXCommand` and `FXUndoList` classes. These serve the same purpose as the `FXCommand` and `FXUndoList` classes from the standard FOX distribution, but they're implemented entirely in Ruby.

For a complete description of these classes and how to use them, see the RD documentation in `fox/undolist.rb`.

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