title: why can't I send a PostMessage?
body: <pre><code>PostMessage(FindWindow(NULL, TEXT("notepad")), WM_LBUTTONDOWN, MK_LBUTTON, MAKELPARAM(160, 140));
  </code></pre>
  
  <p>this code couldn't send an <code>LBUTTONDOWN</code>, something wrong?</p>
  
  <p>i can't sure.. maybe it can send <code>LBUTTONDOWN</code> but wrong position</p>