Sub ChartsToPresentation()
' Set a VBE reference to Microsoft PowerPoint Object Library

Dim PPApp As PowerPoint.Application
Dim PPPres As PowerPoint.Presentation
Dim PPSlide As PowerPoint.Slide
Dim PresentationFileName As Variant
Dim SlideCount As Long
Dim iCht As Integer

' Reference existing instance of PowerPoint
Set PPApp = GetObject(, "Powerpoint.Application")
' Reference active presentation
Set PPPres = PPApp.ActivePresentation
PPApp.ActiveWindow.ViewType = ppViewSlide

For iCht = 1 To ActiveSheet.ChartObjects.Count
    ' copy chart as a picture
    ActiveSheet.ChartObjects(iCht).Chart.CopyPicture _
        Appearance:=xlScreen, Size:=xlScreen, Format:=xlPicture

    ' Add a new slide and paste in the chart
    SlideCount = PPPres.Slides.Count
    Set PPSlide = PPPres.Slides.Add(SlideCount + 1, ppLayoutBlank)
    PPApp.ActiveWindow.View.GotoSlide PPSlide.SlideIndex
    With PPSlide
        ' paste and select the chart picture
        .Shapes.Paste.Select
        ' align the chart
        PPApp.ActiveWindow.Selection.ShapeRange.Align msoAlignCenters, True
        PPApp.ActiveWindow.Selection.ShapeRange.Align msoAlignMiddles, True
    End With

Next

' Clean up
Set PPSlide = Nothing
Set PPPres = Nothing
Set PPApp = Nothing

End Sub