title: Where is the definition of _TP_POOL structure?
body: <p>In order to translate windows vista thread pool API to use in my delphi application. I need to know the definition of <code>_TP_POOL</code>. I looked into <code>winnt.h</code> and found the following <code>typedef</code> declaration:</p>
  
  <pre><code>typedef struct _TP_POOL TP_POOL, *PTP_POOL; 
  </code></pre>
  
  <p>I can't find the <code>_TP_POOL</code> on my local header files. Which is the location of it?</p>