title: Find Elements issue on the pywinauto
body: <p>I recently tried to automate a windows application using a pywinauto since it enables automation with using python. I just started it and encountered a problem which hinders me to continue. </p>
  
  <p>I get this error whenever I try to find the relevant element:</p>
  
  <pre><code>Traceback (most recent call last):
    File "test.py", line 14, in &lt;module&gt;
      app.findwindows.find_elements().click_input()
    File "C:\Users\Bar\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pywinauto\application.py", line 173, in __call__
      format(self.criteria[-1]['best_match']))
  AttributeError: WindowSpecification class has no 'find_elements' method
  </code></pre>
  
  <p>This is my code:</p>
  
  <pre><code>from pywinauto.application import Application
  import pywinauto
  import time
  app = Application(backend='uia').start(r"C:\Program 
  Files\Intellech\Analyzer\Suite.exe")
  time.sleep(3)
  app.findwindows.find_windows(auto_id='btQuick').click_input() 
  </code></pre>
  
  <p>Can you help me to find out the reason of this error?</p>