Public Class Form1
    Inherits System.Windows.Forms.Form
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        With TreeView1
            .Nodes.Add("Node1")
            .Nodes(0).Nodes.Add("Subnode1")
            .Nodes(0).Nodes.Add("Subnode2")
 
            .Nodes.Add("Node2")
            .Nodes(1).Nodes.Add("Subnode3")
            .Nodes(1).Nodes.Add("Subnode4")
        End With
 
        For Each n As TreeNode In TreeView1.Nodes
            Debug.WriteLine(n.Text)
            ZeigAlleNodes(n)
        Next
 
    End Sub
 
    Sub ZeigAlleNodes(ByVal tn As TreeNode)
        For Each x As TreeNode In tn.Nodes
            Debug.WriteLine(x.Text)
        Next
    End Sub
 
End Class