optimizer/Optimizer/Controls/MoonCheck.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace Optimizer {
    public sealed class MoonCheck : CheckBox {
        public MoonCheck() {
            DoubleBuffered = true;
        }

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

            // custom theming
            if (this.Checked) {
                this.Tag = "themeable";
                this.Font = new Font(this.Font, FontStyle.Underline);

                this.ForeColor = OptionsHelper.ForegroundColor;
            }
            else {
                this.Tag = string.Empty;
                this.ForeColor = Color.White;
                this.Font = new Font(this.Font, FontStyle.Regular);
            }
        }
    }
}