private void button_submit_Click(object sender, EventArgs e) { String name = this.combo_name.SelectedItem.ToString(); String month = this.combo_month.SelectedItem.ToString(); String number = this.combo_number.SelectedItem.ToString(); String fruit = this.combo_fruit.SelectedItem.ToString(); int namenum = name.Length + ((this.combo_name.SelectedIndex + 1) * 2); int monthnum = month.Length + ((this.combo_month.SelectedIndex + 1) * 1); int numbernum = int.Parse(number) * 20; int fruitnum = (this.combo_fruit.SelectedIndex + 1) * (fruit.Length * 100); if (Application.OpenForms.OfType <MagicForm>().Count() == 1) //check if its already opened { Application.OpenForms.OfType <MagicForm>().First().Close(); } MagicForm MF = new MagicForm(namenum + monthnum + numbernum + fruitnum); MF.Show(); }