Checkbox customized to toggle button in winforms is not rendered properly when using different monitors with different resolutions

I customized the checkbox to be rendered as a toggle button which doesn't render properly if I use two monitors with different resolutions, otherwise it renders properly. How can I lock it to be displayed as same in any monitor

This is how the custom checkbox looks like,

      protected override void OnPaint(PaintEventArgs e)
    {
        this.OnPaintBackground(e);
        e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
        using (var path = new GraphicsPath())
        {
            var d = Padding.All;
            var r = this.Height - 2 * d;
            path.AddArc(d, d, r, r, 90, 180);
            path.AddArc(this.Width - r - d, d, r, r, -90, 180);
            path.CloseFigure();
            e.Graphics.FillPath(Checked ? Brushes.DarkGray : Brushes.LightGray, path);
            r = Height - 1;
            var rect = Checked ? new Rectangle(Width - r - 1, 0, r, r)
                               : new Rectangle(0, 0, r, r);
            SolidBrush brush = new SolidBrush(Color.FromArgb(0, 122, 204));

            e.Graphics.FillEllipse(Checked ? brush : (TeamsForm.CurrentBackGroundTheme.Name == DarkBackGround) ? Brushes.WhiteSmoke : Brushes.LightGray, rect);
        }