How to capture the value in AVL intracrivity report

Hi ,

i have one doubt please clarify me.

in ALV interactivity report if user click on the one field, how captured the that field value in one variable. presentably i am using

ws_field_catalog-col_pos = '2'.

ws_field_catalog-fieldname = 'BELNR'.

ws_field_catalog-tabname = 'I_OUTPUT'.

ws_field_catalog-scrtext_l = 'Original Document number.'.

ws_field_catalog-hotspot = 'V'.

ws_field_catalog-scrtext_m = 'Original Doc.no.'.

ws_field_catalog-scrtext_s = 'Original Doc.no.'.

APPEND ws_field_catalog TO lt_fieldcat.

CLEAR: ws_field_catalog.

but it is not capture the valu it is capture the only field name please any one can you suggest me.

Thanks,

Hari.