The following VBA example creates paragraph text and displays the number of lines in the paragraph.
Sub Test()
Dim t As Text
Dim s As Shape
Dim d As Document
Dim strText As String
strText = "This is a test. This is a test. This is a test. " & _
"This is a test. This is a test. This is a test."
strText = strText & " This is the next sentence. " & strText
Set d = CreateDocument
Set s = d.ActiveLayer.CreateParagraphText(2, 2, 8, 8, strText)
Set t = s.Text
MsgBox "The number of lines in the text is " & t.Story.Lines.Count
End Sub