title: AttributeError: function 'GetWindowLongPtrW' not found
body: <p>This is on windows x64 for python 2.7</p>
  
  <pre><code>from ctypes import *
  user32 = windll.user32
  GWL_STYLE = -16
  style = c_long(0)
  pstyle = pointer(style)
  pstyle = user32.GetWindowLongPtrW(hwnd, GWL_STYLE)
  </code></pre>
  
  <p>Am getting the error in title.  Is this function not supported in ctypes? I'm using other user32 functions in this pyscript without a problem.</p>