private void set_define_events()
{
this.Load += f327_lap_hop_dong_v3_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;
m_cmd_print.Click += m_cmd_print_Click;
m_tree_don_vi.AfterFocusNode += m_tree_don_vi_AfterFocusNode;
}