private void afis_bin_vw(Graphics desen,int px0,int py0,int bit_w,int nr_biti,string[] nume_biti, UInt64 n)
        {
            System.Drawing.SolidBrush p_verde, p_rosie, p_gri;
            System.Drawing.Pen creion;
            System.Drawing.Font f_nina;
            p_verde = new System.Drawing.SolidBrush(System.Drawing.Color.Lime);
            p_rosie = new System.Drawing.SolidBrush(System.Drawing.Color.Red);
            p_gri = new System.Drawing.SolidBrush(System.Drawing.Color.LightGray);
            creion = new System.Drawing.Pen(System.Drawing.Color.Gray, 2);
            f_nina = new System.Drawing.Font("Nina", 10);
            int x = px0 + bit_w;
            int y = py0 + bit_w;
            int i;
            for (i = nr_biti - 1; i >= 0; i--)
            {
                desen.DrawEllipse(creion, x - 1, y - 1, bit_w + 2, bit_w + 2);
                desen.DrawString(nume_biti[nr_biti - i - 1], f_nina, p_rosie, x + 2 * bit_w, y);
                System.UInt64 bit = ((n >> (nr_biti - i - 1)) & 1);
                if (bit == 1)
                    desen.FillEllipse(p_verde, x, y, bit_w, bit_w);
                else
                    desen.FillEllipse(p_gri, x, y, bit_w, bit_w);
                y += 2 * bit_w;
                
            }
        }