private void button13_Click(object sender, EventArgs e)
        {
            setting open = new setting();

            open.Show();

            this.WindowState = FormWindowState.Minimized;
        }
        private void settingToolStripMenuItem_Click(object sender, EventArgs e)
        {
            setting obj = new setting();

            obj.Show();
        }
        private void exitToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            setting open = new setting();

            open.Show();
        }
 private void settingToolStripMenuItem_Click(object sender, EventArgs e)
 {
     setting obj = new setting();
     obj.Show();
 }