Range.InsertParagraph (Word)

Replaces the specified range with a new paragraph.

After this method has been used, the range is the new paragraph. If you don't want to replace the range, use the Collapse method before using this method. The InsertParagraphAfter method inserts a new paragraph following a Range object.

Set myRange = ActiveDocument.Range(0, 0) 
With myRange 
 .InsertParagraph 
 .InsertBefore "Dear Sirs," 
End With