title: How to perform Click action on Button or Text field by pywinauto
body: <p>I'm using pywinauto to automation Click on some button on DiffDaff software.</p>
  
  <p>My intention are:</p>
  
  <ul>
  <li><p>Step 1: Open DiffDaff software</p></li>
  <li><p>Step 2: Click 'About' button</p>
  
  <pre><code>from pywinauto.application import Application
  
  app = Application.start("C:\Program Files\DiffDaff\DiffDaff.exe")
  
  app.About.Click()
  </code></pre></li>
  </ul>
  
  <p>But, I'm on stuck at step 2, and the console show error:</p>
  
  <pre><code>  File "build\bdist.win32\egg\pywinauto\application.py", line 238, in __getattr__
    File "build\bdist.win32\egg\pywinauto\application.py", line 788, in _resolve_control
  pywinauto.findbestmatch.MatchError: Could not find 'About' in '['', u'DiffDaff - Compare Files, Folders And Web Pages', u'Internet Explorer_Hidden', u'DiffDaff - Compare Files, Folders And Web PagesDialog', 'Dialog']'
  </code></pre>
  
  <p>Where, '', u'DiffDaff - Compare Files, Folders And Web Pages', u'Internet Explorer_Hidden', u'DiffDaff - Compare Files, Folders And Web PagesDialog', 'Dialog' is the title of sotfware</p>
  
  <p>Also, using the command <code>'app.dialogs.print_control_identifiers()'</code> to know what exact position of 'About' button, there is the output:</p>
  
  <pre><code>Button - '&amp;About'   (L750, T388, R834, B411)
      '&amp;About' '&amp;AboutButton' 'Button3'
  </code></pre>
  
  <p>But it's so difficult to understand the parameter as above (what/where is L750, T388,...) - Would you like to explain all the mean of parameters as above ?</p>
  
  <p>And the way to perform 'Click' button ?</p>
  
  <p>Thanks.</p>