title: How to get a window title and scan it every 100ms use python?
body: <p>with python, I want to get a window title,a stock software window.</p>
  
  <p>the window's title will change when I browse another stock ,now I want to  scan it every 100ms and return the new title,but the front text in the window title is the same text.</p>
  
  <p>I can print the title in cmd,but I don't know how to scan it every 100ms and return </p>
  
  <p>I use this code:</p>
  
  <pre><code>from win32gui import *
  import re
  
  titles = set() 
  titlekey = ''
  
  def foo(hwnd,nouse):
      if IsWindow(hwnd) and IsWindowEnabled(hwnd) and IsWindowVisible(hwnd):
          titles.add(GetWindowText(hwnd))
  
  EnumWindows(foo, 0) 
  lt = [t for t in titles if t] 
  lt.sort() 
  for t in lt:
      if re.match(titlekey,t):
          print t
  </code></pre>
  
  <p>How to scan every 100ms and return the new title when it change? </p>