Creating custom progressbar [help]

public partial class FlatProgressBar : UserControl
    {
        public enum Mode
        {
            None,
            Percentage,
            Progress,
            Number
        }

        private Mode _displayMode = Mode.Percentage;

        private float _Max = 100;

        private Color _progressBarColor = Color.Blue;
        private float _value;

        public FlatProgressBar()
        {
            Min = 0;
            InitializeComponent();
        }

        [Category("ProgressBar")]
        public float Value
        {
            get { return _value; }
            set
            {
                _value = value;
                Invalidate();
            }
        }

        [Category("ProgressBar")]
        public Color ProgressBarColor
        {
            get { return _progressBarColor; }
            set
            {
                _progressBarColor = value;
                Invalidate();
            }
        }

        [Category("ProgressBar")]
        public Mode DisplayMode
        {
            get { return _displayMode; }
            set
            {
                _displayMode = value;
                Invalidate();
            }
        }

        [Category("ProgressBar")]
        public float Min { get; set; }

        [Category("ProgressBar")]
        public float Max
        {
            get { return _Max; }
            set { _Max = value; }
        }

        private void FlatProgressBar_Paint(object sender, PaintEventArgs e)
        {
            var gfx = e.Graphics;

            var fontBrush = new SolidBrush(ForeColor);

            if (_value == 0)
            {
                switch (_displayMode)
                {
                    case Mode.None:
                        break;
                    case Mode.Number:
                        gfx.DrawString("0", Font, fontBrush, new PointF(2, ClientRectangle.Height/2 - Font.Size + 1.5f));
                        break;
                    case Mode.Percentage:
                        gfx.DrawString("0%", Font, fontBrush, new PointF(2, ClientRectangle.Height/2 - Font.Size + 1.5f));
                        break;
                    case Mode.Progress:
                        gfx.DrawString("0 / " + Max, Font, fontBrush,
                            new PointF(2, ClientRectangle.Height / 2.0f - Font.Size + 1.5f));
                        break;
                }
                return;
            }

            var brush = new SolidBrush(_progressBarColor);

            var percentage = _value/_Max;

            var rect = new Rectangle(0, 0, (int) (ClientSize.Width*percentage), ClientRectangle.Height);

            gfx.FillRectangle(brush, rect);

            switch (_displayMode)
            {
                case Mode.None:
                    break;
                case Mode.Number:
                    gfx.DrawString(_value.ToString(), Font, fontBrush,
                        new PointF(2, ClientRectangle.Height / 2.0f - Font.Size + 1.5f));
                    break;
                case Mode.Percentage:
                    gfx.DrawString((int) (percentage*100.0f) + "%", Font, fontBrush,
                        new PointF(2, ClientRectangle.Height / 2.0f - Font.Size + 1.5f));
                    break;
                case Mode.Progress:
                    gfx.DrawString(_value + " / " + _Max, Font, fontBrush,
                        new PointF(2, ClientRectangle.Height / 2.0f - Font.Size + 1.5f));
                    break;
            }

            fontBrush.Dispose();
            brush.Dispose();
        }
    }