private void set_define_events()
{
this.Load += f402_tong_hop_cham_cong_Load;
m_sle_chon_nhan_vien.EditValueChanged += m_sle_chon_nhan_vien_EditValueChanged;
//m_cmd_xuat_bao_cao.Click +=m_cmd_xuat_bao_cao_Click;
m_cmd_export_excel.Click += m_cmd_export_excel_Click;
}