Loop Through Charts on Selected (or Range of) Powerpoint Slides - vba

Question

I am currently using this code to update all links in my powerpoint presentation:
Sub UpdateLinks()
Dim ExcelFile
Dim exl As Object
Set exl = CreateObject("Excel.Application")
ExcelFile = "C:\Users\J\Documents\Reporting\Governance Physical Charts.xlsm"
Dim i As Integer
Dim k As Integer
'Go through every slide
For i = 1 To ActivePresentation.Slides.Count
With ActivePresentation.Slides(i)
'Go through every shape on every slide
For k = 1 To .Shapes.Count
On Error Resume Next
'Set the source to be the same as teh file chosen in the opening dialog box
.Shapes(k).LinkFormat.SourceFullName = ExcelFile
If .Shapes(k).LinkFormat.SourceFullName = ExcelFile Then
'If the change was successful then also set it to update automatically
.Shapes(k).LinkFormat.AutoUpdate = ppUpdateOptionAutomatic 'other option is ppUpdateOptionManual
End If
Next k
End With
Next i
End Sub
Instead of updating the link of every chart in the presentation, is it possible to have this code loop through only selected slides? Or if it's easier - is it possible to set a range? For example, only update charts on slides 15-30?
Thank you!
EDIT:
Resolution provided in comments - here is my revised code
Sub UpdateLinks()
Dim ExcelFile
Dim exl As Object
Set exl = CreateObject("Excel.Application")
Dim sld As Slide
ExcelFile = "C:\Users\J\Documents\Reporting\Governance Physical Charts.xlsm"
Dim i As Integer
Dim shp As Shape
For Each sld In ActivePresentation.Slides.Range(Array(11, 12, 13, 14, 15, 16, 17, 18))
For Each shp In sld.Shapes
On Error Resume Next
shp.LinkFormat.SourceFullName = ExcelFile
If shp.LinkFormat.SourceFullName = ExcelFile Then
shp.LinkFormat.AutoUpdate = ppUpdateOptionAutomatic 'other option is ppUpdateOptionManual
End If
Next shp
Next
End Sub

Answer 1

Yes you can compose custom ranges on Slides as well as on Shapes, using an Array as the index parameter. Try this:
Dim sld As Slide
For Each sld In ActivePresentation.Slides.Range(Array(1, 3, 5))
Debug.Print sld.Name
Next
Output:
Slide2
Slide4
Slide6
p.s. I had deleted a slide in the test presentation.

Answer 2

Since you also mentioned processing just selected slides, you can do that like so:
Sub SelectedSlides()
Dim osl As Slide
For Each osl In ActiveWindow.Selection.SlideRange
Debug.Print osl.SlideIndex
Next
End Sub
Note that this will give you the selected slides in REVERSE order of selection. That is, if you control-click slides 2,4,6, this will give you 6,4,2.