Thank you for you're comment.

I tried both you're options before, but they were not suitable for this
problem. I was not clear enough what my problem was. I will try en explain my
problem more clearly.

I have these report excel files, which contain data collected of the years,
the half years, the quarters and the months. The different time periods are
on different Excel sheets. So as time goes by, the number of months, quarters
and years grow. Which means the range is different, that's why you're first
solution does not work. You're second solution will make the Powerpoint files
very large, since some of the Powerpoint files contain over 50 slides of
Excel data.

I was wondering if I could program Powerpoint to retreive the data of Excel
using VBA.

Kind regards.