title: How to detect a window has been maximized?
body: <p>Does anyone know the WM_MESSAGE that is sent when a window has been maximized (either by the maximize button being pressed in the title bar, or by double clicking the title bar?)</p>
  
  <p>Is there a windows message for the maximize button being pressed?</p>
  
  <p>Win32/C++, thanks.</p>