title: Unable to use win32com constants to automate powerpoint
body: <p>I am new to python, trying to automate powerpoint using win32com. I am unable to import or use constants in my scripts. I have ran makepy to create libraries. below is the error messages &amp; script. Can someone tell me how to import constants ? </p>
  
  <p>Script : </p>
  
  <pre><code>import win32com.client
  
  Application    =win32com.client.gencache.EnsureDispatch("PowerPoint.Application")
  Presentation = Application.Presentations.Add()
  Base = Presentation.Slides.Add(1, ppLayoutBlank)
  </code></pre>
  
  <p>Error messages : </p>
  
  <p>Traceback (most recent call last):
    File "ppt.py", line 14, in 
      Base = Presentation.Slides.Add(1, ppLayoutBlank)
  NameError: name 'ppLayoutBlank' is not defined</p>