object that represents the specified lines.
expression.Lines(Start, Length)
expression Required. An expression that returns one of the objects in the Applies To list.
Start Required Long. The first line in the returned range.
Length Optional Long. The number of lines to be returned. Default is 1.
Remarks
If Start is greater than the number of lines in the specified text, the returned range starts with the last line in the specified range.
If Length is greater than the number of lines from the specified starting line to the end of the text, the returned range contains all those lines.
Example
This example replaces the first three lines of the first shape on the first page with the specified string.
Sub ReplaceLines()
Dim rngText As TextRange
Set rngText = ActiveDocument.Pages(1).Shapes(1) _
.TextFrame.TextRange.Lines(Start:=1, Length:=3)
rngText.Text = "This is replacement text." & vbCrLf
End Sub