How to make a result bold in ALV

[SOUHAIL_FAIRADI]

Hi there! I want to display a result in ALV in bold style if the case was successed. The result that I'm talking about is ls_alv_line because it contain the result. 

Thank you

 CASE ls_grp_nature-id_groupe.
        WHEN 1.
          CASE ls_nature-id_nature.
            WHEN '1'.
              CLEAR ls_alv_line.
              ls_alv_line-id_groupe        = ls_grp_nature-id_groupe.
              ls_alv_line-id_nature        = ls_nature-id_nature.
              ls_alv_line-description      = ls_nature-description.

              ls_alv_line-exercice = ls_cpc_line-total_ex.
              ls_alv_line-exercice_pre = ls_cpc_line-total_ex_prec.
              APPEND  ls_alv_line TO et_esg_alv. CASE ls_grp_nature-id_groupe.
        WHEN 1.
          CASE ls_nature-id_nature.
            WHEN '1'.
              CLEAR ls_alv_line.
              ls_alv_line-id_groupe        = ls_grp_nature-id_groupe.
              ls_alv_line-id_nature        = ls_nature-id_nature.
              ls_alv_line-description      = ls_nature-description.

              ls_alv_line-exercice = ls_cpc_line-total_ex.
              ls_alv_line-exercice_pre = ls_cpc_line-total_ex_prec.
              APPEND  ls_alv_line TO et_esg_alv.

[Sandra_Rossi]

ALV for Web Dynpro?