title: Turning on/off and saving update of Bullseye
body: <p>I want to use bullseye code coverage in my dos script.
  And I have written below code. The test.cov file is created but result is not generated on test.cov. </p>
  
  <pre><code>SET MY_LOCAL_COV_FILE=c:\test.cov
  SET COVFILE=%MY_LOCAL_COV_FILE%
  SET COVBUILDZONE=%BUILD_NUMBER% 
  covselect --file "%MY_LOCAL_COV_FILE%" --add c:
  cov01 --on
  MSBuild ".\my.sln" /t:clean /p:Configuration="Debug"
  cov01 --off 
  </code></pre>