private void btnQD_Diem_Click(object sender, EventArgs e)
{
pn_control.Controls.Clear();
QUYDINHDIEM QDĐ = new QUYDINHDIEM();
QDĐ.Location = new Point(0, 0);
pn_control.Controls.Add(QDĐ);
HideSubMenu();
}
private void btnX_Click(object sender, EventArgs e)
{
this.Dispose();
QUYDINHDIEM QD = new QUYDINHDIEM();
}