private void tsLapSoMoi_Click(object sender, EventArgs e)
{
frmSoTietKiem frm = new frmSoTietKiem();
frm.MdiParent = this;
frm.Show();
}
private void TileLapSoMoi_ItemClick(object sender, TileItemEventArgs e)
{
pnZone.Controls.Clear();
frmSoTietKiem frmLapSoMoi = new frmSoTietKiem();
frmLapSoMoi.TopLevel = false;
pnZone.Controls.Add(frmLapSoMoi);
frmLapSoMoi.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
frmLapSoMoi.AutoScroll = true;
frmLapSoMoi.Dock = DockStyle.Fill;
frmLapSoMoi.Show();
}