Accessing and Changing Values in an Excel OLE Object

I have a PPT that has many embedded charts from an Excel file. I have only seen examples of how to copy the embedded file to a drive. What I want to to do is access the Excel file, access a certain worksheet in the file and make changes to cell values to have the displayed chart in the PPT change accordingly. Can this be done? I hope I don't have to use Slides to copy the file to a drive, access and change the values with Cells and then re-embed it back to the PPT with Slides again.

Has anyone done something similar?

Dear jessick,

Yes, it is quite possible and you can see the full code example from this link.