private void mThongKeDoanhSo_Click(object sender, EventArgs e)
{
lblTieuDe.Text = "Thống kê doanh số";
Cursor.Current = Cursors.WaitCursor;
XuLyChuyenForm();
FrmThongKeDoanhSo m_FrmThongKeDoanhThu = FrmThongKeDoanhSo.Instance;
f = m_FrmThongKeDoanhThu;
m_FrmThongKeDoanhThu.MdiParent = this;
m_FrmThongKeDoanhThu.Dock = DockStyle.Fill;
m_FrmThongKeDoanhThu.Show();
}
private void FrmThongKeDoanhThu_FormClosed(object sender, FormClosedEventArgs e)
{
_Instance = null;
}
