[c#]
FlyGrid.Rows.Options |= RowsOptions.ShowAddNewRow;

[c#]
private NodeBase AddNodeToFlyGrid(FlyGrid flyGrid, System.Windows.Forms.TreeNode node)
{
  return AddNodeFromMSTreeView(flyGrid.Rows.RootNode, node);
}

private NodeBase AddNodeFromMSTreeView(NodeBase parent, System.Windows.Forms.TreeNode node)
{
  NineRays.Windows.Forms.Data.TreeViewNode newNode = new NineRays.Windows.Forms.Data.TreeViewNode(new object[]{node.Text});
  newNode.ImageIndex = node.ImageIndex;
  newNode.SelectedImageIndex = node.SelectedImageIndex;
  if (node.Nodes.Count > 0)//if node has children
  {
    //add children
    foreach(TreeNode child in node.Nodes)
    {
      AddNodeFromMSTreeView(newNode, child);
    }
  }
  flyGrid.Rows.Items.Add(newNode);
  return newNode;
}