public class scan
    {
        int x0, y0, w0, h0;
        System.Drawing.Graphics zona_des;
        public void desenez(System.Drawing.Pen creion_a)
        {
            zona_des.DrawRectangle(creion_a, x0, y0, w0, h0);
        }
        public void sterg(System.Drawing.Brush rad)
        {
            zona_des.FillRectangle(rad, x0 + 1, y0 + 1, w0 - 1, h0 - 1);
        }
        public void set_vline(System.Drawing.Pen creion, int pozx_line)
        {
            zona_des.DrawLine(creion, x0 + pozx_line, y0 + 1, x0 + pozx_line, y0 + h0 - 1);
        }
        public void set_hline(System.Drawing.Pen creion, int pozy_line)
        {
            zona_des.DrawLine(creion, x0 +1, y0 + pozy_line, x0 + w0-1, y0+pozy_line);
        }
        public scan(System.Drawing.Graphics desen, int pozx, int pozy, int lat, int inalt)
        {
            zona_des = desen;
            x0 = pozx;
            y0 = pozy;
            w0 = lat;
            h0 = inalt;
        }
    }