SpellCheckAsYouType

1. Download and install Sproxy.

2. Download the WSC plugin for HTMLArea 3.0.

3. Unpack the downloaded zip archive and copy the extracted WSC directory to the HTMLArea 3.0 plugins directory.

4. Specify the core URI of the WSC plugin core URI (see sample, line 11).

5. Load the Scayt plugin (see sample, line 16).

6. When the editor loads, register the WSC plugin invoker:

editor.registerPlugin(WSC4HTMLArea3, {editor:editor, name:sMyWSCName, lang:sInitialLanguage}), where:

WSC4HTMLArea3 — WSC plugin invoker name.
editor {Object, mandatory} — Reference to editor instance object.
sMyWSCName {String, mandatory} — WSC instance name. The name must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]) and underscores ("_").
sInitialLanguage {String, mandatory} — initial spell check language name. Now supported: en, dk, uk, nl, fr, no, el, ge, pt, it, sp, br, se.

See sample, lines 14-16).