This example adds WordArt that contains the text "Test Text" to the active document and anchors the WordArt to the second paragraph.
ActiveDocument.Shapes.AddTextEffect _
PresetTextEffect:=msoTextEffect11, _
Text:="Test Text", _
FontName:="Arial Black", _
FontSize:=36, _
FontBold:=True, _
FontItalic:=False, _
Left:=InchesToPoints(1), _
Top:=InchesToPoints(1), _
Anchor:=ActiveDocument.Paragraphs(2).Range