private void btnHeaderAdvanced_Click(object sender, EventArgs e)
        {
            this.Hide();
            Advanced advc = new Advanced();

            advc.ShowDialog();
        }
 private void advOpBtn_Click(object sender, EventArgs e)
 {
     this.Hide();
     AdvancedOp.Advanced advc = new AdvancedOp.Advanced();
     advc.ShowDialog();
 }