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The WinForms Syntax Editor control is a powerful text editor control similar to the Microsoft Visual Studio editor. It provides a built-in syntax highlighting and code editing experience for popular languages and allows users to create custom syntax highlighting of keywords and operators for their own language. It offers all the essential features end users expect: syntax highlighting, editing, undo, redo, cut, copy, paste, IntelliSense, error validation, line numbering, highlighting modified lines, custom language configuration. It supports context choice, context tooltip, single line mode, multi-tasking with split view, word wrap, printing, and export options.

Syntax highlighting

This control provides syntax highlighting for programming, scripting, and markup languages. It also allows users to customize built-in languages.

Built-in language highlighting

The Syntax Editor control offers built-in syntax highlighting and code editing experiences for the following languages:

  • C#
  • VB.NET
  • XML
  • HTML
  • Java
  • SQL
  • PowerShell
  • C
  • JavaScript
  • VBScript
  • Delphi

WinForms Syntax Editor highlighting the codes for popular languages

Configure custom language

Create custom syntax highlighting of keywords and operators of your own language.

WinForms Syntax Editor highlighting the code using user defined keywords and operators


IntelliSense displays a pop-up with a list of code completion options to speed up coding by reducing typos and other common mistakes.

WinForms Syntax Editor displays intellisense for complete words in code editing

Context prompt

Display helpful pop-up hints about alternate syntax for invoking what is being typed and its parameters. Choose your invocation overload with the Up arrow and Down arrow keys or by clicking the arrow buttons in the pop-up.

Windows Forms code editor displays message in prompt

Context tooltip

Built-in interactive tooltips appear automatically when the pointer is placed over a collapsed block of text.

WinForms Syntax Editor displays tooltip for collapsed text block

Code outlining

Display code blocks in a tree structure and expand and collapse the code blocks interactively for readability. WinForms Syntax Editor automatically chooses where to create outlines for built-in languages. Users can create outlining for their own syntax highlighting.

Collapsed codes blocks in WinForms Syntax Editor

Comment and uncomment code

Comment or uncomment code with the help of the comment option. Users can select the required block of code to comment. WinForms Syntax Editor comments the current line when there is no selection.

Block of codes comment out in WinForms Syntax Editor

Tracking changes

Display markers at the start of lines modified after the file is loaded or after the last file save operation.

WinForms Syntax Editor displays markers at the start of modified lines

Advanced editor capabilities

Undo and redo operations in WinForms Syntax Editor

Undo and redo

Included is keyboard and context menu support for undo and redo operations that erase the last change in a document and reinsert it.

Clipboard operations in WinForms Syntax Editor

Clipboard operations

Use the keyboard or context menu for clipboard operations such as cut, copy, and paste.

WinForms Syntax Editor select lines from specific columns


WinForms Syntax Editor supports rectangular block selection to select lines from specific columns, like in Visual Studio, plus normal selection.

WinForms Syntax Editor displays lines with proper indentation


Indentation support helps format source code to improve readability.

WinForms Syntax Editor displays auto complete options


A list of choices helps complete the word a user is typing.

WinForms Syntax Editor auto corrects the predefined typing error


Predefined typing errors are auto corrected when users press certain keys. Users can also change their autoreplace trigger key.

WinForms Syntax Editor displays line number at beginning of the line

Line numbers

Display the line number at the start of a line to identify the current number and to show or hide the line number.

WinForms Syntax Editor wrap the text to next line

Word wrap

Use different word wrapping styles, such as wrap by word or wrap by character, based on the available text area.

Search and replace

WinForms Syntax Editor shows dialog to search word

Find occurrences of specified text with constraints such as match case, match whole words, and search directions. Also search text in a specific scope like current document or within selected content.

WinForms Syntax Editor shows dialog to search and replace the word


Replace the specified text with the replacement text as per the conditions specified. Replace the first occurrence or all occurrences of the searched text.

Context menu

Built-in context menu support for file, edit, and selection operations, and much more.

WinForms Syntax Editor displays context menu

Content dividers

Clearly distinguish content sections with line dividers similar to Visual Basic to improve code readability.

WinForms Syntax Editor displays intellisense for complete words in code editing

Line formatting

WinForms Syntax Editor highlight the line with different background

Highlight line

Highlight a particular line with different background color. This helps users differentiate a specific line from the non-highlighted lines.

WinForms Syntax Editor displays formatted line with different underline style


Format text by underlining it with different styles such as solid, dash, wave, and dot lines.

Bookmarks and navigation

WinForms Syntax Editor displays bookmark at start of line


Users can locate a section or a line of a document for quick access to any part of the contents in WinForms Syntax Editor.

WinForms Syntax Editor shows go to line dialog

Navigate to the next character, word, or start or end of a line using the keyboard. Users can jump to specific lines using go-to-line dialog.

End-user capabilities

Displays the editing file information in status bar at bottom of WinForms Syntax Editor

Status bar

Display information about the current state of the control such as the current file name, line number, and column number.

WinForms Syntax Editor display dialog to configure key binding for editor commands

Shortcut keys

Shortcut keys can be used for all editing and navigation operations. A built-in window is available for modifying the key mapping of shortcut operations.

Split view

Display a single document in several views with horizontal and vertical orientations, allowing users to work on different areas of a document at the same time.

WinForms Syntax Editor displays content in multiple views to display and edit

Single line mode

Make the Syntax Editor a simple text box with syntax highlighting, editing, and clipboard operations.

WinForms Syntax Editor displays content in single line like textbox


Use the WinForms Syntax Editor as a viewer control in order to view files and restrict code editing.

WinForms Syntax Editor restrict code editing


Displays the editing file information in status bar at bottom of WinForms Syntax Editor

Text appearance

Customize the appearance of the text color in a specific range of lines.

WinForms Syntax Editor displays vertical line at left side to selection lines

Selection margin

Display a thin vertical strip that enables users to select the contents of the entire line.

WinForms Syntax Editor displays selected content with different background

Selection color

Change the background color of selected text in the control.

Displays WinForms Syntax Editor with gradient background

Background customization

Users can customize the background color of the control and even use gradient effects.

Customize the end-of-line character

Users can customize the end-of-line characters and choose whether to show or hide them.

WinForms EditControl End of Line


Use a rich set of built-in themes inspired by popular interfaces such as Visual Studio, Microsoft Office, and Expression Blend.

Visual Studio style WinForms Syntax Editor

Globalization and localization

WinForms Syntax Editor localization


The WinForms Syntax Editor supports localization to translate static text to any supported language.

WinForms Syntax Editor displays content in right to left

Right to left

Right-to-left (RTL) direction is available for users working with right-to-left languages like Hebrew, Arabic, or Persian.

WinForms Syntax Editor export content with syntax highlighting


Export syntax editor content with associated syntax highlighting information to XML, HTML, and RTF file formats.

WinForms Syntax Editor print an entire document or current page


Print syntax editor content either by using the Print option from the print preview or programmatically. The print preview window lets users choose to print an entire document or just the current page and specify the number of copies to print.


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