Some clarification may help get you some answers:

• "creating Word and Powerpoint files through perl?"
  Do you mean converting data which already exists in some other fileformat to Word and PPT?
  ...or
  "creating" ex nihilo from the keyboard and your imagination?
• "...some libs on cpan"
  You do mean you've been searching for "modules," right? If not, do so.
• "...utilize office 2007s open XML format. Is this not a good way of going at it?"
  Maybe, but not necessarily required. Once you have the doc created in an older Word format, Word will cheerfully foul it up ^H^H^H^H^H^H^H convert it for you.
• "...find a clean hello world example either of such open xml based word documents."
  
  1. Perhaps because trying to write "hello world" or any other script using Word is an exercise in futility and frustration.
  2. and because M$ implementations of open standards are rarely conformant to the standards
• "...need to use word"
  Is this relevant in some why I don't understand? Are you trying to tell us you don't want to hear about Open Office solutions, for good reasons or bad?

And it might be useful to specify your OS, etc. In fact, reading On asking for help may help you update your post in ways that help us to help you.

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