title: SetupDiCallClassInstaller throws ERROR_IN_WOW64 when compiled for 32 bit on a 64 bit machine.
body: <p>Calling SetupDiCallClassInstaller on a 64 bit machine when compiled for 32 bit returns false.</p>
  
  <pre><code>GetLastError() == ERROR_IN_WOW64
  </code></pre>
  
  <p>All the other  function calls work fine under 32bit, just this one is giving me problems. </p>
  
  <p>I'm wondering if anyone knows what I am doing wrong here. </p>