private void set_define_events()
{
this.Load += f381_thay_doi_he_so_luong_nang_suat_by_nhan_vien_Load;
m_cmd_search.Click += m_cmd_search_Click;
m_cmd_luu_hs.Click += m_cmd_luu_hs_Click;
m_sle_chon_nhan_vien.EditValueChanged += m_sle_chon_nhan_vien_EditValueChanged;
m_grv_hs_chat_luong.DoubleClick += m_grv_hs_chat_luong_DoubleClick;
m_dat_thang.DateTimeChanged += M_dat_thang_DateTimeChanged;
}