private void mBaoCao_Click(object sender, EventArgs e)
{
lblTieuDe.Text = "Báo cáo";
Cursor.Current = Cursors.WaitCursor;
XuLyChuyenForm();
FrmBaoCao m_frmBaoCao = FrmBaoCao.Instance;
f = m_frmBaoCao;
m_frmBaoCao.MdiParent = this;
m_frmBaoCao.Dock = DockStyle.Fill;
m_frmBaoCao.Show();
}
private void FrmBaoCao_FormClosed(object sender, FormClosedEventArgs e)
{
_Instance = null;
}