private void btnformPhanquyen_Click(object sender, EventArgs e)
{
// show form PQ
FormPhanQuyen frmnew = new FormPhanQuyen();
frmnew.Activate();
frmnew.ShowDialog();
}
private void button5_Click(object sender, EventArgs e)
{
// thoát form QLPQ
Visible = false;
ShowInTaskbar = false;
// show form PQ
FormPhanQuyen frmnew = new FormPhanQuyen();
frmnew.Activate();
frmnew.Show();
}