The following VBA example creates paragraph text, filling the last line with red.
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, 5, 5, strText)
Set t = s.Text
t.Story.Lines.Last.Fill.UniformColor.RGBAssign 155, 0, 0
End Sub