title: How to import a interface in delphi?
body: <p>I  want to get folder path from windows library (eg: Libraries\Documents ) . I find it need to use <a href="http://msdn.microsoft.com/en-us//library/windows/desktop/dd391719%28v=vs.85%29.aspx" rel="nofollow noreferrer">IShellLibrary interface</a> but I can't find declared in <code>ShlObj</code> (Delphi 2009 x64 win7) . I wonder how to import this interface to my code ?
  <img src="https://i.stack.imgur.com/ukIYj.png" alt="enter image description here"></p>