title: Find last save time of a closed workbook
body: <p>I am trying to make a macro that can reference when another workbook was last updated without opening it.</p>
  
  <p>I found this one but it only works on the active workbook:</p>
  
  <pre><code>Function LastModified() as Date
  
    LastModified = ActiveWorkbook.BuiltinDocumentProperties("Last Save Time")
  
  End Function
  </code></pre>
  
  <p>What I want is something like this:</p>
  
  <pre><code>Function LastModified() as Date
  
    LastModified = path."c:/test.xlsx".BuiltinDocumentProperties("Last Save Time")
  
  End Function
  </code></pre>
  
  <p>But that didn't work of course. How do I fix this?</p>