private void inDanhSáchPhòngThiToolStripMenuItem_Click(object sender, EventArgs e)
{
if (!CheckExitsFrom("FrmDsPhongThi"))
{
FrmDsPhongThi fm = new FrmDsPhongThi();
fm.MdiParent = this;
fm.Show();
}
else ActiveChildForm("FrmDsPhongThi");
}
private void button2_Click(object sender, EventArgs e)
{
FrmDsPhongThi f = new FrmDsPhongThi();
f.Show();
}