CustomColorEditor

public class CustomColorEditor : ColorEditor
{
    private static TabPage MyColors_TabPage;
    private static ListBox MyColors_ListBox;

    private static object[] MyColor_Values
    {
        get
        {
            if (MyColor_Constants == null)
            {
                MyColor_Constants = GetConstants(typeof(Color));
            }

            return MyColor_Constants;
        }
    }

    static CustomColorEditor()
    {
        MyColors_TabPage = new System.Windows.Forms.TabPage();
        MyColors_TabPage.Location = new System.Drawing.Point(4, 22);
        MyColors_TabPage.Name = "MyColors_TabPage";
        MyColors_TabPage.Size = new System.Drawing.Size(192, 174);
        MyColors_TabPage.TabIndex = 3;
        MyColors_TabPage.Text = "My Colors";
        MyColors_TabPage.UseVisualStyleBackColor = true;

        MyColors_ListBox = new System.Windows.Forms.ColorEditorListBox();
        MyColors_ListBox.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
        // MyColors_ListBox.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;
        MyColors_ListBox.Dock = System.Windows.Forms.DockStyle.Fill;
        MyColors_ListBox.FormattingEnabled = true;
        MyColors_ListBox.IntegralHeight = false;
        MyColors_ListBox.Location = new System.Drawing.Point(0, 0);
        MyColors_ListBox.Name = "MyColors_ListBox";
        MyColors_ListBox.Size = new System.Drawing.Size(192, 248);
        MyColors_ListBox.Sorted = false;
        MyColors_ListBox.TabIndex = 0;
        Array.Sort(MyColor_Values, new CustomColorEditor.StandardColorComparer());
        MyColors_ListBox.Items.Clear();
        MyColors_ListBox.Click += new System.EventHandler(OnMyColorsClick);
        MyColors_ListBox.KeyDown += new System.Windows.Forms.KeyEventHandler(OnMyColorsKeyDown);

        foreach (object item in MyColor_Values) { MyColors_ListBox.Items.Add(item); }
    }

    private static void OnMyColorsClick(object sender, EventArgs e)
    {
        ListBox listBox = (ListBox)sender;
        if (listBox.SelectedItem != null)
        {
            value = (Color)listBox.SelectedItem;
        }
        // edSvc.CloseDropDown();
    }

    private static void OnMyColorsKeyDown(object sender, KeyEventArgs ke)
    {
        if (ke.KeyCode == Keys.Return)
        {
            OnMyColorsClick(sender, EventArgs.Empty);
        }
    }

    private class StandardColorComparer : IComparer
    {
        public int Compare(object x, object y)
        {
            Color color = (Color)x;
            Color color2 = (Color)y;
            if (color.A < color2.A)
            {
                return -1;
            }

            if (color.A > color2.A)
            {
                return 1;
            }

            if (color.GetHue() < color2.GetHue())
            {
                return -1;
            }

            if (color.GetHue() > color2.GetHue())
            {
                return 1;
            }

            if (color.GetSaturation() < color2.GetSaturation())
            {
                return -1;
            }

            if (color.GetSaturation() > color2.GetSaturation())
            {
                return 1;
            }

            if (color.GetBrightness() < color2.GetBrightness())
            {
                return -1;
            }

            if (color.GetBrightness() > color2.GetBrightness())
            {
                return 1;
            }

            return 0;
        }
    }

    private static object[] GetConstants(Type enumType)
    {
        MethodAttributes methodAttributes = MethodAttributes.Public | MethodAttributes.Static;
        PropertyInfo[] properties = enumType.GetProperties();
        ArrayList arrayList = new ArrayList();
        foreach (PropertyInfo propertyInfo in properties)
        {
            if (propertyInfo.PropertyType == typeof(Color))
            {
                MethodInfo getMethod = propertyInfo.GetGetMethod();
                if (getMethod != null && (getMethod.Attributes & methodAttributes) == methodAttributes)
                {
                    object[] index = null;
                    arrayList.Add(propertyInfo.GetValue(null, index));
                }
            }
        }

        return arrayList.ToArray();
    }



    public override object EditValue(ITypeDescriptorContext context, System.IServiceProvider provider, object value)
    {
        CustomColorEditor custom_color_editor = this;

        Type color_ui_type = typeof(System.Drawing.Design.ColorEditor).GetNestedType("ColorUI", BindingFlags.NonPublic);
        ConstructorInfo color_ui_constructor = color_ui_type.GetConstructors()[0];
        FieldInfo color_ui_field = typeof(System.Drawing.Design.ColorEditor).GetField("colorUI", BindingFlags.Instance | BindingFlags.NonPublic);
        object color_ui_object = color_ui_constructor.Invoke(new[] { custom_color_editor });
        color_ui_field.SetValue(custom_color_editor, color_ui_object);

        FieldInfo tabControl_field = color_ui_object.GetType().GetField("tabControl", BindingFlags.Instance | BindingFlags.NonPublic);
        object tabControl_object = tabControl_field.GetValue(color_ui_object);

        TabControl tab_control = tabControl_object as TabControl;
        tab_control.Controls.Add(MyColors_TabPage);
        MyColors_TabPage.Controls.Add(MyColors_ListBox);

        object selected_value = base.EditValue(context, provider, value);
        return selected_value;
    }
}