TPE

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Option Explicit

Sub SortMe()

    Dim x As Long
    Dim rayTitles() As Variant
    Dim lIndex As Long
    ReDim Preserve rayTitles(1 To ActivePresentation.Slides.Count) As Variant


    ' collect titles and indices in array
    ' Sort array only works with 1-dimension arrays so we'll combine the slide title and index
    ' then sort 'em out later:
    For x = 1 To ActivePresentation.Slides.Count
        rayTitles(x) = GetTitle(ActivePresentation.Slides(x)) & "|||" & CStr(x)
    Next

    ' sort the array
    Call BubbleSortVariantArray(rayTitles())

    ' rearrange:
    For x = 1 To UBound(rayTitles)
        ' split out the index of the slide
        lIndex = CLng(Mid$(rayTitles(x), InStr(rayTitles(x), "|||") + 3))
        Debug.Print rayTitles(x)
        ActivePresentation.Slides(lIndex).MoveTo ActivePresentation.Slides.Count
    Next


End Sub

Function GetTitle(oSld As Slide) As String
' return the slide title for oSld if any

    Dim oSh As Shape

    For Each oSh In oSld.Shapes
        If oSh.Type = msoPlaceholder Then
            If oSh.PlaceholderFormat.Type = ppPlaceholderTitle Or oSh.PlaceholderFormat.Type = ppPlaceholderCenterTitle Then
                ' it's a title
                GetTitle = oSh.TextFrame.TextRange.Text
            End If
        End If
    Next

End Function

Public Sub BubbleSortVariantArray(rayIn() As Variant)

  Dim lLow As Long
  Dim lHigh As Long
  Dim intX As Long
  Dim intY As Long
  Dim varTmp As Variant

  On Error GoTo Errorhandler

  ' Get the bounds of the array
  lLow = LBound(rayIn)
  lHigh = UBound(rayIn)

  For intX = lLow To lHigh - 1
    For intY = intX + 1 To lHigh
      If rayIn(intX) > rayIn(intY) Then
        varTmp = rayIn(intX)
        rayIn(intX) = rayIn(intY)
        rayIn(intY) = varTmp
      End If
    Next intY
  Next intX

NormalExit:
  Exit Sub

Errorhandler:
  MsgBox "There was a problem sorting the array"
  Resume NormalExit
End Sub