How can i read the field name in the internal table

Hi friends
i want to read the internal table filed name.
my requirement is like this:
data: begin of t_header occurs 0,
       extno(12),
       priotiy(5),
       ecnumber(10).
      end of t_header.
loop at t_header.
if the field name is priority i want to write some other
logic here.....
endloop.
Please tell me how can i do this.

data: wf_fld_cat type slis_t_fieldcat_alv .
data: wf_repid like sy-repid .
data: int_tab_name type slis_tabname .
move: sy-repid to wf_repid ,
 'INT_OUTPUT' to int_tab_name .
call function 'REUSE_ALV_FIELDCATALOG_MERGE'
 exporting
 i_program_name = wf_repid
 i_internal_tabname = int_tab_name
I_STRUCTURE_NAME =
I_CLIENT_NEVER_DISPLAY = 'X'
 i_inclname = wf_repid
 i_bypassing_buffer = 'X'
I_BUFFER_ACTIVE =
 changing
 ct_fieldcat = wf_fld_cat[]
 exceptions
 inconsistent_interface = 1
 program_error = 2
 others = 3
if sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif.
wf_fld_cat[] will hold the itab definition.
Regards
Raja

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Getting field names of an internal table

Hi all,
Does anyone know if exists a statement, function module or method that gets the field names of an internal table ?
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Hi,
See this
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Hi all,
I'd like to display all the field names of the internal table or a structure.
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Thanks in advance.
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        NAME(20) TYPE C,
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DATA: BEGIN OF ITAB OCCURS 0,
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How can i read the field name in the internal table

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