If you right click on a Powerpoint slide in the online web app, you can use the "Link to this slide" menu to get a URL. That URL can be used to take you back to that specific slide.
We have a Powerpoint add-in and there does not appear to be a way to access that URL programmatically so I would like to try and generate it.
I have found that the URL contains a URL parameter called "nav" and this is a base64 encoded string. Here is what it looks like when decoded:
{"sId":258,"cId":649829976}
I know the sID is the slide ID and I can obtain this programmatically within the add-in.
Does anyone know what the "cId" is? For each slide, it is different so I don't think it is something using to the document itself, but rather it is tied to the slide.