// MDI frmBaoCaoThongKe
void MoFormBaoCaoThongKe()
{
Form frm = KiemTraFormTonTai(typeof(frmBaoCaoThongKe));
if (frm != null)
{
frm.Activate();
}
else
{
frmBaoCaoThongKe m_frmThongKe = frmBaoCaoThongKe.Instance;
m_frmThongKe.MdiParent = this;
m_frmThongKe.Dock = DockStyle.Fill;
m_frmThongKe.Show();
}
}
private void frmThongKe_FormClosed(object sender, FormClosedEventArgs e)
{
_Instance = null;
}