VSColorOutput - Visual Studio Output Coloring Extension

VSColorOutput provides color highlighting for the build and debug output windows in Visual Studio. I wrote it to highlight trace output in debug output window. I found it made it easier to find trace messages I was interested in during debug sessions.

It also highlights build errors and warnings. Here’s an example:



Download and open the VsColorOutput.visx file. VSColorOutput supports Visual Studio 2010/2011. You can also find it in the Visual Studio Extension Gallery. To uninstall, go the _Tools Extensions_ page, find VSColorOutput in the Installed Extensions and click uninstall. Registry entries are not removed so later installations will reuse these settings.

How does it work?

VSColorOutput hooks into the the classifier chain of Visual Studio. This allows VSColorOutput to monitor every line sent to the output window. A list of classifiers, consisting of regular expressions and classifications is checked. The first matching expression determines the classification the line of text. If no patterns match, then line is classified as BuildText.

From here, Visual Studio does the heavy lifting of mapping the classification to a color. Colors are stored in the registry.


Out of the box, VSColorOutput will match most error and warning messages. It uses regular expressions to match lines to output classifier categories. You access these settings from the _Tools Options VSColorOutput_ options page.



The regular expressions use the .NET form (http://msdn.microsoft.com/en-us/library/hs600312.aspx), which varies slightly from those used by Ruby, JavaScript, Python, etc.

To restore the default patterns, simply remove all the patterns.

At run-time, VSColorOutput will walk this list in order, testing the line of text against the regular expression. If it matches, the line is given the classification associated with the pattern. No additional patterns are tested for the given line. Therefore, the order of the classifiers is significant.

There are nine VSColor classifications. They are:

  • Build Text
  • Build Header
  • Log Information
  • Log Warning
  • Log Error
  • Log Custom1
  • Log Custom2
  • Log Custom3
  • Log Custom4

The names reflected their intended use but are entirely arbitrary.

To change the color of the classification go to the _Options Environment Fonts and Colors_ dialog. The colors are grouped near the bottom starting with VSColorOutput:


The is project is open source and available at http://vscoloroutput.codeplex.com. I welcome contributions and suggestions as always. If you have an issue, please try to capture a log, or stack trace, or send me a sample project that reproduces the issue.

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