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.