<div class="content"><p align="right"><a href="https://msdn.microsoft.com/en-us/library/48cbee2a-0790-45f2-8269-931d7083b2c3" data-linktype="external">msdn link</a></p><p>The LUID structure is 64-bit value guaranteed to be unique
only on the system on which it was generated. The uniqueness of a locally
unique identifier (LUID) is guaranteed only until the system is restarted.</p><dl>
<dd>
<div><pre> typedef struct _LUID {
   DWORD LowPart;
   LONG HighPart;
 } LUID,
  *PLUID;
</pre></div>
</dd></dl><p><b>LowPart:</b>  The low-order bits of the
structure.</p><p><b>HighPart:</b>  The high-order bits of
the structure.</p></div>