thank you for your detailed answer!
You approach won't work for me because:
- I do embed a Word inside the PowerPoint.
- The word contains FormFields (e.g. Title, Revision, ChangeDate)
- I load the PowerPoint, load the Word, update the FormFields, store the Word in PowerPoint again and then save the PowerPoint document.
So far you approach could work, but I need also create a PDF document, therefor I save_as PDF and the preview image needs to be updated before.
The Excel team added a auto update function (see above) that's why I thought we could do the same in PowerPoint.