XMLNode.FirstChild (Word)
Returns a DiagramNode object that represents the first child node of a parent node.
Use the LastChild property to access the last child node. Use the Root property to access the parent node in a diagram.
Sub FirstChild()
Dim shpDiagram As Shape
Dim dgnRoot As DiagramNode
Dim dgnFirstChild As DiagramNode
Dim dgnLastChild As DiagramNode
Dim intCount As Integer
'Add organizational chart diagram to the current document
Set shpDiagram = ActiveDocument.Shapes.AddDiagram _
(Type:=msoDiagramOrgChart, Left:=10, _
Top:=15, Width:=400, Height:=475)
'Add the first node to the diagram
Set dgnRoot = shpDiagram.DiagramNode.Children.AddNode
'Add three child nodes
For intCount = 1 To 3
dgnRoot.Children.AddNode
Next intCount
'Assign the first and last child nodes to variables
Set dgnFirstChild = dgnRoot.Children.FirstChild
Set dgnLastChild = dgnRoot.Children.LastChild
End Sub