Opening of GRC Approver Screen

Hi,

I came across the requirement where in i need to develop custom work inbox screen(using webdynpro) same as standard screen with additional fields.

On the click of subject hyperlink, i need to open custom approver screen instead of standard approver screen.In my custom approver screen, i have button namely change and approve request. On the click of that button, i need to open standard approver screen.

I followed below link to open standard approver screen( drawback is that : it opens approver screen in display mode)

Customizing Access request and approval screens in GRC Access Control

DATA: it_visible_fields  TYPE powl_visible_cols_tty,

          lt_results         TYPE grfn_t_unified_powl,

          lw_results         TYPE grfn_s_unified_powl,

          lt_messages        TYPE powl_msg_tty,

          lt_selcrit_values  TYPE rsparams_tt,

          lt_requser         TYPE grac_t_api_user_info,

          lv_index           TYPE sy–tabix.

lw_visible_fields-colid = ‘CREATED_BY’.

    APPEND lw_visible_fields TO it_visible_fields.

    CLEAR lw_visible_fields.

    lw_visible_fields–colid = ‘CREATED_ON’.

    APPEND lw_visible_fields TO it_visible_fields.

    lw_visible_fields–colid = ‘DUE_DATE’.

    APPEND lw_visible_fields TO it_visible_fields.

    CLEAR lw_visible_fields.

    lw_visible_fields–colid = ‘STATUS_DESC’.

    APPEND lw_visible_fields TO it_visible_fields.

    CLEAR lw_visible_fields.

    lw_visible_fields–colid = ‘SUBJECT’.

    APPEND lw_visible_fields TO it_visible_fields.

*—–>data retrieval for represented object type

    CREATE OBJECT obj.

    CALL METHOD obj->if_powl_feeder~get_objects

      EXPORTING

        i_username       = sy–uname

        i_applid         = ‘GRFN_INBOX’

        i_type           = ‘GRFN_INBOX’

        i_selcrit_values = lt_selcrit_values

        i_langu          = sy–langu

        i_visible_fields = it_visible_fields

      IMPORTING

        e_results        = lt_results

        e_messages       = lt_messages.

In lt_results, we will get all workitem data, we just need to read that internal table with index( index of hyperlink on which it is clicked).

READ TABLE  lt_results INTO ls_results INDEX r_param_index.

if     sy-subrc = 0.

workitem_id = ls_results-request_no. ( ls_results-request_no holds workitem id).

endif.

Thanks

KH