progressBar sans bordure

C'est vraiment facile de se faire une progressBar customisée cf.
Code:
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    public partial class BasicProgressBar : UserControl
    {
        public BasicProgressBar()
        {
            InitializeComponent();
 
            FillBrush = new SolidBrush(BarColor);
            BackBrush = new SolidBrush(BackColor);
        }
 
        public override Color BackColor
        {
            get
            {
                return base.BackColor;
            }
            set
            {
                base.BackColor = value;
 
                BackBrush = new SolidBrush(value);
            }
        }
 
        int maximum = 0;
        int value = 0;
 
        public virtual int Maximum
        {
            get { return maximum; }
            set { maximum = value; Invalidate(); }
        }
 
        public virtual int Value
        {
            get { return value; }
            set { this.value = value; Invalidate(); }
        }
 
        Color barColor = Color.White;
 
        protected virtual Brush FillBrush { get; set; }
        protected virtual Brush BackBrush { get; set; }
 
        public virtual Color BarColor
        {
            get { return barColor; }
            set
            {
                barColor = value;
                FillBrush = new SolidBrush(barColor);
                Invalidate();
            }
        }
 
        protected override void OnPaint(PaintEventArgs e)
        {
            if (Width > 1 && Height > 1)
            {
                if (Value >= 0 && Maximum > 0)
                {
                    double percent = ((double)Value) / ((double)Maximum);
 
                    int desiredWidth = (int)(Width * percent);
 
                    e.Graphics.FillRectangle(FillBrush, 0, 0, desiredWidth, Height);
                    if (desiredWidth < Width)
                    {
                        e.Graphics.FillRectangle(BackBrush, desiredWidth, 0, (Width - desiredWidth), Height);
                    }
                }
            }
 
            base.OnPaint(e);
        }
    }