Activating and Selecting Objects should be avoided whenever possible. You are better of working with the Shapes using a ShapeRange.
Sub Main()
Dim ShapeRange As ShapeRange
Set ShapeRange = FindShapes(ActiveWindow.View.Slide, "Textbox 60")
If Not ShapeRange Is Nothing Then
End If
End Sub
Function FindShapes(Slide As Slide, Pattern As String) As ShapeRange
Dim Results() As Long
ReDim Results(1 To Slide.Shapes.Count)
Dim n As Long
Dim Index As Long
For Index = 1 To Slide.Shapes.Count
With Slide.Shapes(Index)
.Name = "Textbox 60"
If .Name Like Pattern Then
n = n + 1
Results(n) = Index
End If
End With
Next
If n > 0 Then
ReDim Preserve Results(1 To n)
Set FindShapes = Slide.Shapes.Range(Results)
End If
End Function
Note: I rewrote the code to handle multiple shapes with the same name.