title: Win32 Set window to receive no input
body: <p>(this is not MFC)</p>
  
  <p>I created a window which is transparent and covers the whole screen. However, I want it to be merely an overlay, not accepting any clicks or keyboard presses anywhere, only covering parts of the screen (and even there, don't accept input). It should be always on top (works so far) and should not block input to the windows below it. Is there a way to set this somewhere or a way to workaround this?</p>
  
  <p><code>EnableWindow(hWnd, false);</code> does not do what I want (obviously).</p>