title: What does it mean to append "\<num>" to file paths under HKCR\TypeLib\<TypeLib>
body: <p>I've seen several (not all) registry values like the followings, when trying to parse out the file path under the TypeLib registry key:</p>
  
  <pre><code>HKEY_CLASS_ROOT\TypeLib\\{EE9CFA8C-F997-4221-BE2F-85A5F603218F}\1.0\0\win64(Defalt): C:\Program Files (x86)\Microsoft Office\root\VFS\ProgramFilesX64\Microsoft Office\Office16\OCHelper.dll\1
  
  HKEY_CLASS_ROOT\TypeLib\\{F9E34568-0298-46D3-B9C4-19AFB415CBA8}\1.0\0\win32(Default): C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Packages\mswebprj.dll\5
  
  HKEY_CLASS_ROOT\TypeLib\\{F2A7EE29-8BF6-4a6d-83F1-098E366C709C}\1.0\0\win32(Default): C:\Program Files (x86)\Microsoft Office\Root\Office16\ONENOTE.EXE\2
  </code></pre>
  
  <p>Each file path is appended with a backslash followed a number. Apparently, these file paths are not legal to file system. I'm wondering if anyone recognizes the syntax, and what the appendix means to a typelib registration under these registry key.</p>