private void set_initial_form_load()
{
m_dat_ngay_bat_dau.EditValue = DateTime.Now.Date;
m_dat_ngay_ky.EditValue = DateTime.Now;
load_data_to_sle_nhan_vien();
load_data_to_sle_loai_hop_dong();
load_data_to_sle_loai_lao_dong();
load_data_to_sle_don_vi();
load_data_to_sle_chuc_vu();
load_data_to_sle_ma_lcd();
load_data_to_sle_muc_lcd();
set_defines_event();
}