TextBoxMaterial

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
using System.ComponentModel;

namespace main.Classes.CustomControls {

    class TextBoxMaterial : TextBox {

        Label leftPadding = new Label() {
            Width = 7,
            Dock = DockStyle.Left,
            BackColor = Color.White,
        };
        public TextBoxMaterial() {
            this.BorderStyle = System.Windows.Forms.BorderStyle.None;
            AutoSize = false;
            this.Controls.Add(new Label() {
                Height = 2,
                Dock = DockStyle.Bottom,
                BackColor = Color.Gray,
            });

            // This only docks and overlays above the text :(
            this.Controls.Add(leftPadding);
        }

    }
}