Visual Assist X is a plugin for Microsoft Visual Studio

Microsoft Visual Studio

Microsoft Visual Studio is an integrated development environment from Microsoft. It is used to develop console and graphical user interface applications along with Windows Forms applications, web sites, web applications, and web services in both native code together with managed code for all...

 developed by Whole Tomato. It primarily enhances IntelliSense

IntelliSense

IntelliSense is Microsoft's implementation of autocompletion, best known for its use in the Microsoft Visual Studio integrated development environment...

 and syntax highlighting

Syntax highlighting

Syntax highlighting is a feature of some text editors that display text—especially source code—in different colors and fonts according to the category of terms. This feature eases writing in a structured language such as a programming language or a markup language as both structures and...

. It also enhances code suggestions, refactoring

Refactoring

Code refactoring is "disciplined technique for restructuring an existing body of code, altering its internal structure without changing its external behavior", undertaken in order to improve some of the nonfunctional attributes of the software....

 options and spell checking support for comments. It can also detect basic syntax mistakes, such as use of undeclared variables. Unlike ReSharper

ReSharper

ReSharper is a refactoring and productivity extension by JetBrains that extends native functionality of Microsoft Visual Studio 2003, 2005, 2008 and 2010....

, Visual Assist X also supports C++.

As of June 2010, Visual Assist X currently supports Visual C++ 6 and all editions of Visual Studio (including Visual Studio 2010), except Express editions.