How to know the save option "embed only the character used in the presentation" is turned on?

I have MS PowerPoint file. I want to know if whether the save option "embed only the character used in the presentation is turned on. I am looking for in the internet, but I don't find the solution for my problem. Anyone can help me to find solution to this problem? I am looking forward to hearing from you. Sorry if my English is not good. (I am using C# and VBA)

Solution

If you can examine the XML that makes up the saved file, look at the PRESENTATION.XML file where you'll find something like this at the top of the file:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p:presentation xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main"
                xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
                xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main"
                embedTrueTypeFonts="1"
                saveSubsetFonts="1">

My copy of PPT here (Office 365) seems to be acting up; whether I save with the entire font embedded or with just needed characters (6 of them or so), the saved file is the same size and both values above are = "1".

Story of my life ... can't test any little thing w/o getting sidetracked by two or three apparent bugs. ;-)