How to change a Powerpoint presentation through C#?

Question

C++ / C#

The task is to change some slides in presentations. There are hundreds of presentations. And you only need to edit one slide in each. How can this be done using C#?
There is something like Microsoft.Office.Interop.Graph, but I did not find any documentation with code examples. Can you suggest a link where you can read about its classes, methods, etc.?

Answer 1

Look towards OpenXML
The presentation is a big XML wrapped in zip - you need to change something in it.
(relevant for the new format. The old format, which does not end with x, must be different)