BrightIdeasSoftware.ObjectListView.AddCheckStateBitmap C# (CSharp) Method

        private void AddCheckStateBitmap(ImageList il, string key, CheckBoxState boxState)
        {
            Bitmap b = new Bitmap(il.ImageSize.Width, il.ImageSize.Height);
            Graphics g = Graphics.FromImage(b);
            g.Clear(il.TransparentColor);
            Point location = new Point(b.Width / 2 - 5, b.Height / 2 - 6);
            CheckBoxRenderer.DrawCheckBox(g, location, boxState);
            il.Images.Add(key, b);
        }