Controls Library: Extended ListView with Column Mapping

using System;
using System.Windows.Forms;
using dwf.tool;
using System.Drawing;

namespace dwf.gui.test
{
    public class DiffTest : UserControl
    {
        private Label textALabel = new Label();
        private Label textBLabel = new Label();
        private TextBox textA = new TextBox();
        private TextBox textB = new TextBox();
        private Button test = new Button();
        private PList result = new PList();
        private GroupBoxItem itemParam = new GroupBoxItem();
        private GroupBoxItem itemResult = new GroupBoxItem();
        private GroupBoxMap map = new GroupBoxMap();
        private TableLayoutPanel panel = new TableLayoutPanel();
        public DiffTest()
        {
            this.textALabel.Text = "Param1:";
            this.textALabel.TextAlign = ContentAlignment.BottomCenter;

            this.textBLabel.Text = "Param2:";
            this.textBLabel.TextAlign = ContentAlignment.BottomCenter;

            this.textA.Text = "Sequential Read: Up to 550 MB/s ";
            this.textA.Dock = DockStyle.Fill;

            this.textB.Text = "Sequential Write: Up to 510 MB/s ";
            this.textB.Dock = DockStyle.Fill;

            this.test.Text = "Test";
            this.test.Click += TestOnClick;

            this.result.Dock = DockStyle.Fill;
            this.result.GenerateToString = false;
            this.result.SelectionChanged += result_SelectionChanged;

            this.panel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 60));
            this.panel.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
            this.panel.Controls.Add(textALabel, 0, 0);
            this.panel.Controls.Add(textA, 1, 0);
            this.panel.Controls.Add(textBLabel, 0, 1);
            this.panel.Controls.Add(textB, 1, 1);
            this.panel.Controls.Add(test);
            //test.RowSpan = 

            this.itemParam.Control = panel;
            this.itemParam.FillWidth = true;
            this.itemParam.Text = "Params";

            this.itemResult.Control = result;
            this.itemResult.Row = 1;
            this.itemResult.FillHeight = true;
            this.itemResult.Text = "Result";

            this.map.Add(this.itemParam);
            this.map.Add(this.itemResult);
            this.map.Dock = DockStyle.Fill;

            this.Controls.Add(map);
            this.BackColor = SystemColors.Control;
            this.Text = "Diff Test";
        }

        private void result_SelectionChanged(object sender, PListSelectionArgs e)
        {
            if (result.SelectedItem != null)
            {
                var rez = (ListTool.DiffRez)result.SelectedItem;
                var box = rez.Type == ListTool.DiffType.Deleted ? textA : textB;
                box.SelectionStart = rez.Index;
                box.SelectionLength = rez.Length;
                box.Focus();
            }
        }

        private void TestOnClick(object sender, EventArgs e)
        {
            result.ListSource = ListTool.Diff(textA.Text, textB.Text, false);
        }
    }
}