private void set_define_events()
{
Load += F300_chinh_lns_nhan_vien_Load;
m_cmd_insert.Click += M_cmd_insert_Click;
m_cmd_update.Click += M_cmd_update_Click;
m_cmd_delete.Click += M_cmd_delete_Click;
xtraTabControl1.SelectedPageChanged += XtraTabControl1_SelectedPageChanged;
m_cmd_chon_file.Click += m_cmd_chon_file_Click;
m_cmd_refresh.Click += m_cmd_refresh_Click;
m_cmd_filter.Click += m_cmd_filter_Click;
}