The following VBA example links frames of paragraph text, applying bold formatting to the text in the last frame.
Sub Test()
Dim d As Document
Dim s As Shape
Dim s1 As Shape
Dim s2 As Shape
Dim t As Text
Set d = CreateDocument
Set s = d.ActiveLayer.CreateParagraphText(2, 2, 4, 4, String$(750, "Z"))
Set s1 = d.ActiveLayer.CreateParagraphText(5, 5, 7, 7)
Set s2 = d.ActiveLayer.CreateParagraphText(8, 8, 10, 10)
Set t = s.Text
' Link the frames together.
t.Frame.LinkTo s1
s1.Text.Frame.LinkTo s2
t.Frames.Last.Range.Bold = True
End Sub