public class drcon
    {
        int x0, y0, w0, h0;
        System.Drawing.Graphics zona_des;
        public void desenez(Color culoare_contur)
        {
            zona_des.DrawRectangle(new Pen(culoare_contur), x0, y0, w0, h0);
        }
        public void sterg(Color culoare_stergere)
        {
            zona_des.FillRectangle(new SolidBrush(culoare_stergere), x0 + 1, y0 + 1, w0 - 2, h0 - 2);
        }
        public void setdr(Color culoare_dr, int w, int h)
        {
            int x = System.Convert.ToInt16(System.Convert.ToDouble(x0) + System.Convert.ToDouble(w0 - w) / 2);
            int y = System.Convert.ToInt16(System.Convert.ToDouble(y0) + System.Convert.ToDouble(h0 - h) / 2);
            zona_des.DrawRectangle(new Pen(culoare_dr), x + 1, y + 1, w, h);
        }
        public drcon(System.Drawing.Graphics desen, int pozx, int pozy, int lat, int inalt)
        {
            zona_des = desen;
            x0 = pozx;
            y0 = pozy;
            w0 = lat;
            h0 = inalt;
        }
    }