title: How do I write to the Visual Studio Output Window in My Custom Tool?
body: <p>I am writing a custom tool and I currently have it doing what I want as far as functionality. I would like to be able to write to Visual Studio if something goes wrong.  (Incorrectly formatted code or whatever). </p>
  
  <p>Are there any standards for this? Right now I basically can force the tool to fail and Visual Studio puts in a warning that it has done so.  I'd like a category in the Output window with any resulting messages I want to send.  I could also live with a more descriptive task/warning in the Error list window.</p>