Creating a macro to replace an object in Powerpoints

Hi Jens, thanks for the reply! Yes it is a lot of powerpoints - about 450 powerpoints and I just want to update the company logo on them as we had a brand change. the powerpoints are split between about 40 folders... So I want the macro to sequentially run through each folder.

If I were to do it manually, say allow 90 seconds to open up each powerpoint, delete the current logo and replace it with a new logo - we're looking at about 11 hours of solid work! So I figured writing a macro would be better and help me put into practice what I learned. I'll check the website you recommend and see how far I get.

I do have another - simpler question though. I have a list of 400 names and some of them have a Yes next to them. So I am working with 2 columns of data, I want the macro to only display the names which have a yes next to them. I tried this:

Sub ForEachTest()
For Each i In Range("A1:A347")
If i(0, 1) = "" Then
Kill cell
End If
Next i

End Sub

But I think I'm getting confused with whether I need decision code of For Each or maybe I need a variables. Are you able to help with this one?

Many thanks, Catherine