Pass i_table with changing

Question

Hello all,
I m trying to pass an internal table with CHANGING
Code
FORM X
it_zfichpai type table of zfichpai,
wa_zfichpai like line of it_zfichpai.
perform create_md5key changing wa_zfichpai-MD5KEY
                            it_zfichpai.
ENDFORM.
FORM create_MD5key changing hkey type zfichpai-md5key
                            -> p_zfichpai like zfichpai <-(dont work).
the "like" doesn't work,neither "like table of", "type", "type table of"
A way to do it is to make a global declaration of it_zfichpai and use "like" statement in my form declaration but I want my it_zfichpai declaration stay local.
Need help

Answer 1

define a table type like.
types: begin of ty_ltap,
             lgnum like ltap-lgnum,
             tanum like ltap-tanum,
             tapos like ltap-tapos,
          end of ty_ltap,
          tt_ltap type table of ty_ltap.
data: i_ltap type tt_ltap.
You can use the table type in the definition of the subroutine :
FORM subroutine changing pi_ltap type tt_ltap.
ENDFORM.
And call it by :
perform subroutine changing i_ltap.
regards,
Hans