private void btnAddNode_Click(object sender, EventArgs e)
        {
            PxMenuSelection selectedMenu = (PxMenuSelection)tvMenuSelection.SelectedNode.Tag;
            int levelNo;
            int.TryParse(selectedMenu.LevelNo, out levelNo);
            if (levelNo < 4)
            {
                CreateMenuSelectionDialog frmCreateDialog = new CreateMenuSelectionDialog();
                frmCreateDialog.NewMenuSelection.Parent = selectedMenu;
                frmCreateDialog.NewMenuSelection.LevelNo = (levelNo + 1).ToString();
                if (frmCreateDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    selectedMenu.Childrens.Add(frmCreateDialog.NewMenuSelection);
                    TreeNode newTheme = new TreeNode();
                    newTheme.Name = frmCreateDialog.NewMenuSelection.Menu;
                    newTheme.Text = frmCreateDialog.NewMenuSelection.PresText;
                    newTheme.Tag = frmCreateDialog.NewMenuSelection;

                    tvMenuSelection.SelectedNode.Nodes.Add(newTheme);
                    tvMenuSelection.SelectedNode = newTheme;
                }
            }
        }
        private void btnAddNode_Click(object sender, EventArgs e)
        {
            PxMenuSelection selectedMenu = (PxMenuSelection)tvMenuSelection.SelectedNode.Tag;
            int             levelNo;

            int.TryParse(selectedMenu.LevelNo, out levelNo);
            if (levelNo < 4)
            {
                CreateMenuSelectionDialog frmCreateDialog = new CreateMenuSelectionDialog();
                frmCreateDialog.NewMenuSelection.Parent  = selectedMenu;
                frmCreateDialog.NewMenuSelection.LevelNo = (levelNo + 1).ToString();
                if (frmCreateDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    selectedMenu.Childrens.Add(frmCreateDialog.NewMenuSelection);
                    TreeNode newTheme = new TreeNode();
                    newTheme.Name = frmCreateDialog.NewMenuSelection.Menu;
                    newTheme.Text = frmCreateDialog.NewMenuSelection.PresText;
                    newTheme.Tag  = frmCreateDialog.NewMenuSelection;

                    tvMenuSelection.SelectedNode.Nodes.Add(newTheme);
                    tvMenuSelection.SelectedNode = newTheme;
                }
            }
        }