private void tsLopHoc_Click(object sender, EventArgs e)
{
this.Close();
frmLopHoc frmLh = new frmLopHoc();
frmLh.Show();
}
private void btnLopHoc_Click(object sender, EventArgs e)
{
frmLopHoc frm = new frmLopHoc();
//frm.TopLevel = false;
//frm.FormBorderStyle = FormBorderStyle.None;
//frm.Show();
////Add frm vào panel
//pnl.Size = frm.Size;
//pnl.Controls.Add(frm);
////Gán location của panel ra khỏi form main
//pnl.Location = new Point(iDoRongFormMain, 50);
////Chạy timer
//tmNhapDiem.Start();
frm.ShowDialog();
}