SyntaxEditor is a powerful editing control, similar to a multi-line TextBox
BSEditor: SyntaxEditor is a powerful editing control, Similar to a multi-line TextBox, which syntax Highlights text and provides an amazing number of state-of-the-art features for code editing. SyntaxEditor is modeled after the code editor in Visual Studio and provides nearly all of its functionality and more. Custom language definitions can be developed and distributed with your applications. While SyntaxEditor is designed for use in IDE (integrated development environment) applications, there are many other applications out there than can take advantage of such a control.

The SyntaxEditor package includes:

The SyntaxEditor multi/single line edit control.
The Document class, which allows for parsing and manipulation of code documents with or without the use of a SyntaxEditor (separation of UI and parsing model).
The extensible SyntaxLanguage class, which provides a self-contained way to handle advanced language parsing and processing.
The SyntaxEditor Parser Generator that helps construct a robust semantic parser for languages in either C# or VB.NET.
The semantic parser service that can perform semantic parsing operations in a separate worker thread.
An object model for building and manipulating an AST (abstract syntax tree) of a code document.
A custom backtracking NFA regular expression engine, used as the backbone for dynamic language Lexical parsing and find/replace operations.
The TextStylePreview control that visualizes highlighting styles, and the FontDropDownList that allows for easy font selection.
Many free dynamic language XML definitions for common languages such as C#, VB.NET, HTML, etc.
Availability of advanced add-on products, such as the .NET and Web Languages Add-ons, which provide complete parsing and automated IntelliPrompt for C#, VB.NET, and XML. you can free download Actipro SyntaxEditor 4.0.0274 now.