content: tell application "Microsoft PowerPoint"
  	launch
  	set presentationCount to number of presentations
  	-- see http://thesource.ofallevil.com/mac/developers/default.mspx?CTT=PageView&clr=99-21-0&target=2511850e-bf23-4a4e-a58a-078b50c6c6a11033&srcid=7830652b-fe36-4563-bedb-94aa37694b301033&ep=7
  	repeat 3 times
  		try
  			set thePresentation to presentation "%@"
  		on error
  			open POSIX file "%@"
  			set thePresentation to active presentation
  		end try
  		if thePresentation is not missing value then
  			exit repeat
  		else
  			delay 1
  		end if
  	end repeat
  	save thePresentation in (POSIX file "%@" as text) as save as PDF
  	set slideShow to slide show view of slide show window of thePresentation
  	if slideShow exists then
  		exit slide show slideShow
  	end if
  	if number of presentations is not equal to presentationCount then
  		close thePresentation
  	end if
  	tell application "System Events"
  		set visible of process "Microsoft PowerPoint" to false
  	end tell
  end tell
  