How to set toolTips for the nodes in the WinForms TreeViewAdv control?

private void button1_Click(object sender, System.EventArgs e)
{
   for (int i=0;i<30;i++)
   {
      //create new TreeNodeAdv
      TreeNodeAdv newNode = new TreeNodeAdv("node"+i.ToString());
      //set it's Tooltip using the HelpText
      newNode.HelpText = newNode.Text;
      //add node to TreeViewAdv control
      this.treeViewAdv1.Nodes.Add(newNode);
   }
}

Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
   For i As Integer = 0 To 29
       'create new TreeNodeAdv
       Dim newNode As TreeNodeAdv = New TreeNodeAdv("node" & i.ToString())
       'set it's Tooltip using the HelpText
       newNode.HelpText = newNode.Text
       'add node to TreeViewAdv control
       Me.treeViewAdv1.Nodes.Add(newNode)
   Next i
End Sub