title: how to use pywin32 sendmessage function to send a upper char or number char?
body: <p>can any body help me ? when i use the follow function to send a lower char, a to z,  to a window, it work well. However, I don't know how to send a upper char, A to Z, or number char 0 to 9. I have test it many times.</p>
  
  <pre><code>def post_keys(hwnd, i):
      win32api.SendMessage(hwnd, win32con.WM_KEYDOWN, i, 0)
      win32api.SendMessage(hwnd, win32con.WM_KEYUP, i, 0)
  </code></pre>
  
  <p>thans very much.</p>