title: win32com.client.DispatchWithEvents for multiple objects in the same thread
body: <p>I am trying to listen for the OnItemAdd event in 2 separate inboxes at the same time with the following code:</p>
  
  <pre><code>    class Handler_Class():
          def OnItemAdd(self, mail):
              #Check if the item is of the MailItem type
              if mail.Class==43:
                  print(mail.Subject, " - ", mail.Parent.FolderPath)
      inboxes = ["inbox1", "inbox2"]
      for inbox in inboxes:
          items = win32com.client.DispatchEx("Outlook.Application").GetNamespace("MAPI").Folders[inbox].Folders["Inbox"].Items
          win32com.client.DispatchWithEvents(items, Handler_Class)
      print(datetime.now(),"Ready to pump")
      pythoncom.PumpMessages()
  </code></pre>
  
  <p>The pythoncom.PumpMessages() doesn't seem to work though. if I refactor the code to only listen for one inbox's items, it does work.</p>
  
  <p>Any ideas on how to solve this?</p>