TachyonSpell is an ActiveX DLL that provides Spell Checking capabilities to programming languages which support the Component Object Model (COM). It is primarily designed for Visual Basic 6.

Included languages:	English (102,000 words)
Features:	Default or custom Spell-Check dialog, suggestions, window-less spell checking, and many more.
Licensing:	Royalty free Single Developer - $99 Site License - $399 Site License and Source Code - $699
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'Spell-check a textbox and handle an event for each misspelled word
TS.CheckText Text1.Text

Private Sub TS_SpellWordNotInDic(ByVal sOriginalWord As String, ByVal lPosStart As Long, Cancel As Boolean)
    Text1.SelStart = lPosStart mDiffLetNum
    Text1.SelLength = Len(sOriginalWord)
End Sub

'Spellcheck a single word and display the best suggestion (index 0)
If TS.CheckWord("mispeled") = FalseThen
    MsgBox TS.GetSuggestions("mispeled")(0)
End If

[1.1c]
* Several improvements to the suggestion engine. Should display more suggestions now, and order them by similarity to the misspelled word.
* Added SuggestionSimilarity (default to 0.8, or 80%) property which sets how much a word needs to be similar to another to be picked up as a possible suggestion. You can lower this value to get more suggestions, or increase it to get less/more accurate suggestions.
* Added HTML help file.

[1.1b]
* Few minor fixes.

[1.1a]
* Fixed a bug that occured while using the “Change All” button.

[1.1]
* Added "Change All" and "Ignore All" buttons on the spelling suggestion dialog.
* Added SpellChangeAll event, which occurs when the user clicks Change All, take a look at the sample TextEditor for more help.
* Added SpellCheckCancel event, which occurs when the user clicks Cancel or when the spell check is cancelled through code.
* Added SpellCheckComplete event.
* Added SpellCheckProgress event which will notify you of the current spell checking progress.
* Fixed spell checking of the last word in a paragraph.
* Added the ability to disable certain buttons on the built-in suggestion dialog.
* Renamed component to tspell11en.dll to make room for future versions, and address potential incompatibilities.
* Other minor improvements.
* Added another sample that shows you how to bypass the default spell check dialog to replicate Microsoft® Office™ spell checking behavior.