private void changeDataToolStripMenuItem_Click(object sender, EventArgs e)
 {
     AddNewForm an = new AddNewForm(conn, this, "change");
     an.Show();
 }
 private void addNewToolStripMenuItem_Click(object sender, EventArgs e)
 {
     AddNewForm an = new AddNewForm(conn, this, "add");
     an.Show();
 }