private void set_define_events() { Load += f311_danh_sach_nhan_vien_theo_don_vi_Load; m_tree_don_vi.AfterFocusNode += m_tree_don_vi_AfterFocusNode; m_cmd_them_moi_cong_tac.Click += m_cmd_them_moi_cong_tac_Click; }