private void set_define_events()
{
FormClosed += f409_rpt_bang_luong_FormClosed;
Load += f409_rpt_bang_luong_Load;
m_cmd_tinh_bang_luong.Click += m_cmd_tinh_bang_luong_Click;
m_cmd_luu_du_lieu.Click += m_cmd_luu_du_lieu_Click;
m_txt_thang.Leave += m_txt_thang_Leave;
m_txt_nam.Leave += m_txt_nam_Leave;
m_cmd_import_excel.Click += m_cmd_import_excel_Click;
m_cmd_export_excel.Click += m_cmd_export_excel_Click;
m_grv_main.MouseWheel += m_grv_main_MouseWheel;
m_cmd_kiem_tra_du_lieu.Click += m_cmd_kiem_tra_du_lieu_Click;
}