private void điểmToolStripMenuItem_Click(object sender, EventArgs e)
{
FrmLop f3 = new FrmLop();
f3.StartPosition = FormStartPosition.CenterScreen;
f3.Show();
}
private void lớpToolStripMenuItem_Click_1(object sender, EventArgs e)
{
FrmLop f4 = new FrmLop();
f4.StartPosition = FormStartPosition.CenterScreen;
f4.Show();
}
private void lớpToolStripMenuItem_Click(object sender, EventArgs e)
{
FrmLop f4 = new FrmLop();
f4.Show();
}