private void MineClearance_Load(object sender, EventArgs e)
        {
            InitializeGame();
        }

        public void InitializeGame()
        {
            int x = Convert.ToInt16(cbHorizontal.Text);
            int y = Convert.ToInt16(cbVertical.Text);
            int mineNum = Convert.ToInt16(cbMine.Text);
            for (int v = 0; v < y; v++)
            {
                for (int h = 0; h < x; h++)
                {
                    Button btn = CreateBtn(h,v);
                    btn.Tag = h + "," + v;
                    panelMine.Controls.Add(btn);
                }
            }
         }