//Measure
        private void Measure_MouseUp(object sender, MouseEventArgs e)
        {
            ButtonCircle btnDisappear = (ButtonCircle)sender;

            if (!(Measure.Location.X >= XBOX && Measure.Location.Y >= YBOX))
            {
                timer1_Tick(null, null);
                Measure.Location = new Point(23, 155);
            }

            FlagMeasure = false;
        }
        private void btnMove_MouseUp(object sender, MouseEventArgs e)
        {
            ButtonCircle btnDisappear = (ButtonCircle)sender;

            if (!(btnMove.Location.X >= XBOX && btnMove.Location.Y >= YBOX))
            {
                if (listPositive.Contains(btnDisappear))
                {
                    CountPositive--;
                    listPositive.Remove(btnDisappear);
                }
                if (listNegative.Contains(btnDisappear))
                {
                    CountNegative--;
                    listNegative.Remove(btnDisappear);
                }
                timer1_Tick(null, null);
                Controls.Remove(btnDisappear);
            }
            Flag = false;
        }
        //Charges
        private void PositiveCharges_MouseDown(object sender, MouseEventArgs e)
        {
            ButtonCircle btnGoc = (ButtonCircle)sender;
            ButtonCircle btn    = new ButtonCircle();

            btn.Location  = new Point(btnGoc.Location.X, btnGoc.Location.Y);
            btn.Size      = new Size(btnGoc.Size.Width, btnGoc.Size.Height);
            btn.FlatStyle = FlatStyle.Flat;
            btn.FlatAppearance.BorderSize = 0;
            btn.BackgroundImageLayout     = btnGoc.BackgroundImageLayout;
            btn.BackgroundImage           = btnGoc.BackgroundImage;
            btn.Tag        = Qcharges.ToString();
            btn.MouseDown += new MouseEventHandler(btnMove_MouseDown);
            btn.MouseUp   += new MouseEventHandler(btnMove_MouseUp);
            listPositive.Add(btn);
            Controls.Add(btn);
            listPositive[CountPositive].BringToFront();

            btnMove_MouseDown(listPositive[CountPositive], null);
            btnVuaTao = btn;
            CountPositive++;
        }