The Arrowheads property returns the ArrowHeads collection.
Examples:
The following VBA example applies an arrowhead with an index of 5 to the beginning of the outlines of each selected object.
Sub ItemArrowHead()
Dim s As Shape
For Each s In ActiveDocument.Selection.Shapes
If s.Outline.Type = cdrOutline Then
s.Outline.StartArrow = ArrowHeads.Item(5)
'can also be referenced as s.Outline.StartArrow = ArrowHeads (5)
End If
Next s
End Sub