The following VBA example links frames of paragraph text. It fits text to an ellipse and then displays the index number of each frame that is fitted to a shape.
Sub Test()
Dim s As Shape
Dim s1 As Shape
Dim s2 As Shape
Dim t As Text
Dim f As TextFrame
Dim d As Document
Set d = CreateDocument
Set s = d.ActiveLayer.CreateParagraphText(2, 2, 5, 5, String$(1000, "Z"))
Set s1 = d.ActiveLayer.CreateParagraphText(5, 5, 8, 8)
Set s2 = d.ActiveLayer.CreateEllipse(8, 8, 10, 10)
Set t = s.Text
' Link the frames together.
t.Frame.LinkTo s1
' Fit the text to the ellipse.
s.Text.FitToPath s2
' Iterate through the frames.
For Each f In t.Frames
If f.IsFittedToPath = True Then
Select Case f.Path.Type
Case 2
MsgBox "Frame " & f.Index & " is fitted to an ellipse."
Case Else
MsgBox "Frame " & f.Index & " is fitted to a shape."
End Select
End If
Next f
End Sub