title: What is the best source for information on COM error codes?
body: <p>I'm at a loss for where to get the best information about the meaning, likely causes, and possible solutions to resolve COM errors when all you have is the HRESULT.</p>
  
  <p>Searching Google for terms like '80004027' is just about useless as it sends you to random discussion groups where 90% of the time, the question 'What does 80004027 mean?' is not answered.</p>
  
  <p>What is a good resource for this?  Why isn't MSDN the top Google result?</p>