expression.ToggleVerticalText
expression Required. An expression that returns one of the objects in the Applies To list.
Remarks
Using the ToggleVerticalText method swaps the values of the Left and Top properties of the Shape object that represents the WordArt and leaves the Width and Height properties unchanged.
The Flip method and Rotation property of the Shape object and the RotatedChars property and ToggleVerticalText method of the TextEffectFormat object all affect the character orientation and the direction of text flow in a Shape object that represents WordArt. You may have to experiment to find out how to combine the effects of these properties and methods to get the result you want.
Example
This example adds WordArt that contains the text "Test" to the active publication, and switches from horizontal text flow (the default for the specified WordArt style, msoTextEffect1) to vertical text flow.
Dim shpTextEffect As Shape
Set shpTextEffect = ActiveDocument.Pages(1).Shapes.AddTextEffect _
(PresetTextEffect:=msoTextEffect1, Text:="Test", _
FontName:="Arial Black", FontSize:=36, _
FontBold:=False, FontItalic:=False, Left:=100, Top:=100)
shpTextEffect.TextEffect.ToggleVerticalText