I seem to remember a while ago seeing a PDF that had all the icons that InDesign uses, and a method to access and use them in my own custom scripts.
I have gone through all my resource PDFs that at have accumulated over the years, and cannot seem to find it.\
Does anyone have a PDF file containing this information, or an online resource for it?
Chances are you're talking about Peter Kahrel's script Icon Catalogue (Create icon cataloge | Peter Kahrel). Description: The script creates a catalogue of the icons used in InDesign's interface. A single text frame is placed on the first page of the document; you'll need to flow it manually.
That was not what I remember, but I gave it a go in cc2015, but didnt seem to work. The link sent by Jump_Over was more like I remember, but its not up to date....
I will keep looking.