The MSTest plugin can convert TRX format test reports into JUnit XML format so it can be recorded by Hudson.
To enable the MSTest plugin features you need to set up your build to run MSTest.exe (or VSTest.Console.exe) first. Example:

"%PROGRAMFILES%\Microsoft Visual Studio 9.0\Common7\IDE\MSTest.exe" /runconfig:MyTestProject\LocalTestRun.testrunconfig /testcontainer:MyTestProject\bin\Release\MyTestProject.dll /resultsfile:TestResults\testResults.trx

and then specify the path to the MSTest TRX file, 'TestResults/testResults.trx' in the above example.

When using VSTest.Console.exe, you can't specify the path to the resulting TRX file. Thus, you can specify a pattern like 'TestResults/**/*.trx' (/ or \, that's the same).

If you use the vstestrunner-plugin, the full path to the TRX file is exposed by an environment variable. So, you can also use an environment variable, like '$VSTEST_RESULT_TRX' or '${VSTEST_RESULT_TRX}'.

In all the above examples, the ' character is there only to delimitate the pattern to use, and shall not be included in the pattern.