This example adds a WordArt object to worksheet one and then right aligns the WordArt.
Set mySh = Worksheets(1).Shapes
Set myTE = mySh.AddTextEffect(PresetTextEffect:=msoTextEffect1, _
Text:="Test Text", FontName:="Palatino", FontSize:=54, _
FontBold:=True, FontItalic:=False, Left:=100, Top:=50)
myTE.TextEffect.Alignment = msoTextEffectAlignmentRight