Use this constructor to construct a instance of the SpellChecker class. This constructor takes in the location of the SpellingChecker.bundle.
The SpellingChecker.bundle is needed because non Cocoa Application cannot talk directly to the Cocoa framework.
If your Application is a Mach-O Application (MacOS X only in the REALbasic build settings) then you can pass in nil for the Bundle and you do not need to include to SpellingChecker with your application.
PEF applications still need to include the SpellingChecker bundle.