Hello! I'm new to VBA, specially Powerpoint's. I was wondering if it's possible to add from VBA an image watermark and block it so user's when seeing/editing the file can't modify or erase it?

Another solution would be converting the ppt to pdf with the watermark but, I want to consider this as the last option.

Is it possible?

I'm only somewhat familiar with Excel's VBA. And I found something but only works for text and doesn't say anything about blocking it. I'm assuming is somewhat similar.