private void exitGameToolStripMenuItem_Click(object sender, EventArgs e)
        {
            StopGame();
            DialogResult rs = MessageBox.Show("Bạn có chắc muốn thoát game không", "Thông Báo", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (rs == DialogResult.Yes)
            {
                Application.Exit();
            }
            else
            {
                pic_pau_st.Image = Properties.Resources.pause_icon;
                TM_BiaVang.Start();
                TM_NguoiHung.Start();
            }
        }
 private void newGameToolStripMenuItem_Click(object sender, EventArgs e)
 {
     foreach (Control x in this.Controls)
     {
         if (x is PictureBox && x.Tag == "biavo")
         {
             x.Dispose();
         }
     }
     pic_pau_st.Image = Properties.Resources.pause_icon;
     score            = 0;
     miss             = 0;
     StartGame1();
     Btn_Click(sender, e);
     TM_BiaVang.Start();
     TM_NguoiHung.Start();
 }
 private void pic_pau_st_Click(object sender, EventArgs e)
 {
     start_pau = !start_pau;
     if (start_pau)
     {
         audiochayGame.Stop();
         pic_pau_st.Image = Properties.Resources.start_icon;
         TM_NguoiHung.Stop();
         TM_BiaVang.Stop();
     }
     else
     {
         audiochayGame.PlayLooping();
         pic_pau_st.Image = Properties.Resources.pause_icon;
         TM_NguoiHung.Start();
         TM_BiaVang.Start();
     }
 }
        private void TM_RanDom_Tick(object sender, EventArgs e)
        {
            int r = ran.Next(0, 4);

            if (r == 0)
            {
                hotro.displayPic(picb1, picb2, picb3, picb4);// hiện ảnh 1 , ẩn 3 ảnh sau
            }
            if (r == 1)
            {
                hotro.displayPic(picb2, picb1, picb3, picb4);
            }
            if (r == 2)
            {
                hotro.displayPic(picb3, picb2, picb1, picb4);
            }
            if (r == 3)
            {
                hotro.displayPic(picb4, picb2, picb3, picb1);
            }
            TM_RanDom.Stop();
            TM_BiaVang.Start();
        }