終於，從System.Windows.Forms.Control繼承了一下。

一個好網頁，不錯，聊天記錄，記下。

前天發的這個隨筆，裡面記載了一些資源，由於真正接觸.NET（Win Form?）還是比較晚，所以目前為止還是笨鳥，還是後飛。

仔細看了裡面一些資源，終於做出來了第一個Control，慶祝一下吧。

using System;
using System.Windows.Forms;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Design;

namespace DividerPanel
{
    /**//// <summary>
    /// My First Control.
    /// </summary>
    [ToolboxItem(true)]
    [ToolboxBitmap(typeof(MyFirstControl))]
    public class MyFirstControl : System.Windows.Forms.Control
    {

        private System.Drawing.Drawing2D.GraphicsPath graphicsPath = new GraphicsPath(System.Drawing.Drawing2D.FillMode.Alternate);

        private Color backColor = Color.Black;

        public MyFirstControl()
        {
            this.graphicsPath.AddPolygon(new Point[]{
                                                new Point(10, 0),
                                                new Point(10, 10),
                                                new Point(0, 10),
                                                new Point(0, 90),
                                                new Point(10, 90),
                                                new Point(10, 100),
                                                new Point(190, 100),
                                                new Point(190, 90),
                                                new Point(200, 90),
                                                new Point(200, 10),
                                                new Point(190, 10),
                                                new Point(190, 0)
                                            });

            this.Region = new Region(graphicsPath);
        }

        private void InitializeComponent()
        {
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            LinearGradientBrush b = new LinearGradientBrush(this.ClientRectangle,
                this.backColor, this.backColor, 0, false);
              
            e.Graphics.FillRectangle(b, this.ClientRectangle);
        }

        protected override void OnGotFocus(EventArgs e)
        {
            base.OnGotFocus (e);
            this.backColor = Color.Red;
            this.Invalidate();
        }

        protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus (e);
            this.backColor = Color.Black;
            this.Invalidate();
        }

        protected override void OnClick(EventArgs e)
        {
            base.OnClick (e);

            this.Focus();
        }

    }
}