private void biểuĐồPhổĐiểmToolStripMenuItem_Click(object sender, EventArgs e)
{
if (!CheckExitsFrom("phodiemthi"))
{
PhoDiemThi fm = new PhoDiemThi();
fm.MdiParent = this;
fm.Show();
}
else ActiveChildForm("phodiemthi");
}
private void button13_Click(object sender, EventArgs e)
{
PhoDiemThi f = new PhoDiemThi();
f.Show();
}
