title: How to convert Notes document link to HTML link
body: <p>I am charged with maintaining some old code, in which we are extracting a Notes link from a message, and turning it into a link that can be called from HTML on a local machine (on which Notes is installed). We have a situation where one link works, and another one does not.</p>
  
  <p>I am struggling to understand what exactly this code is doing, and why it even works in the first place. Basically, we are looking at the property "$Links" in an email message.  The value of this property, for example, when viewed in Notes, is something like:</p>
  
  <pre><code>RFC2257F23:004852B9
  VFA5208C4C:6552DA01-VN422569FB:003AAC2D
  NF6D24A297:6579B8E3-NNC225805D:004D8678
  </code></pre>
  
  <p>What our code does is get the binary value of this property, using NSFItemInfo and OSLockBlock.  It then starts at offset 11, and works backwards 8 bytes, converting each byte to a 2 digit hex value.  Then it does the same thing 3 more times, but moving the offset 8 bytes forward from the original 11.  A '/' character is inserted after the 1st and 3rd of these 8 byte segments. Then the whole thing is appended to "notes:///".  At the end, the link generated looks like this:</p>
  
  <pre><code>Notes:///C2257F23004852B9/A5208C4C6552DA01422569FB003AAC2D/6D24A2976579B8E3C225805D004D8678
  </code></pre>
  
  <p>I'm guessing that this value represents the Notes UNID of the document link, and that when clicked on, Notes
  starts up, and goes directly to the document.  So does anyone have an idea as to why one link would work, and
  the other fail?  Our customer claims that the Notes links database is intact, and can be viewed successfully
  from within Notes itself.</p>