RapidSpell Desktop .NET for WinForms was first released over 12 years ago, it has been refined by thousands of real world customer experiences to produce the current version, 5. As you type, user options, dialog mode, auto correct - it's all there, and stable! Customizable UI and behavior - our open API lets you quickly add spell checking the way you want it. Whether developing applications in C# or VB.NET, full code examples and demo projects are provided in both languages. Our best, in-house sculpted dictionaries are a cut above the rest who often use open source dictionaries. Four English language variants and 17 extra dictionaries including medical and legal. All dictionaries are customizable. RapidSpell Desktop provides a simple interface specification which allows 3rd Party Controls to be used with the Dialog checker. This simple mechanism means it is possible to use just about any Control with RapidSpell Desktop, the full product includes an 'adapter' controls for the popular "TX TextControl", DevExpress "XtraGrid" & "MemoExEdit" and Janus' "GridEX" & "EditBox" and Infragistics' "UltraTextEditor". The product comes with source code demos in C# and VB.NET for; TXTextControl - as you type and dialog checking (view Help article) Infragistics - UltraTextEditor (as you type and dialog checking) and UltraGrid (as you type checking) controls Janus - EditBox (as you type and dialog checking) and GridEx (as you type checking) controls DevExpress - XtraGrid (as you type checking) view KB article and MemoExEdit (as you type and dialog checking) view KB article. Knowledge Base articles are available for; Compona - SyntaxBox https://keyoti.com/kb/Default.aspx?ToDo=view&questId=44&catId=44 Other controls are usually supportable through the ISpellCheckableTextComponent interface which allows the dialog checker to work with them.