How to use conversion routine?

Question

hi,
in my z-table i have a field called matnr for the material number say.
its domain defines it as 18 char.
say i have created an entry say 200.
so it will be saved may be as 000000000000000200.
i want it should be displayed with as 200.
and if i search for say 200.
so it should not look for the proceeding zero's.
it should not give me an error that record doesn't exists.
please tell me how to use exaclty conversion routine.
thanks
ekta

Answer 1

hi all,
the problem has been solved.
CONVERSION_EXIT_MATN1_OUTPUT   this FM module can only be used where the z-table has matnr of the type MATNR the standard matnr of the table mara.
so in my program it was not working.
my data element was not matnr.
i had used a popup for position finder.
so it could not read the material number which had zeros as prefixes.
thanks for all the help
thanks
ekta
below the code is mentioned...................
*******************************C O D E*******************************************
    WHEN '&POS'.
      popup_title       = 'Choose The Material Number'.
      CLEAR it_fields.
      it_fields-tabname    = 'Z10ET_TAB_MAT01'.
      it_fields-fieldname  = 'MATNR'.
      it_fields-field_attr = ' '.
      it_fields-field_obl  = 'X'.
      APPEND it_fields.
      CALL FUNCTION 'POPUP_GET_VALUES'
        EXPORTING
          no_value_check  = 'X'
          popup_title     = popup_title
          start_column    = '5'
          start_row       = '5'
        IMPORTING
          returncode      = returncode
        TABLES
          fields          = it_fields
        EXCEPTIONS
          error_in_fields = 1
          OTHERS          = 2.
      IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
      ENDIF.
      IF returncode = ' '.
        MESSAGE i036 WITH it_fields-value.
        SORT it_material_data BY matnr.
        READ TABLE it_material_data INTO wa_material_data
                        WITH KEY matnr = it_fields-value.
        IF sy-subrc = 0.
          tab_ctrl1-top_line = sy-tabix.
          REFRESH it_fields.
          CLEAR returncode.
          CLEAR ok_code_0101.
        ELSE.
          CONCATENATE concat it_fields-value INTO v_matnr.
          READ TABLE it_material_data INTO wa_material_data
                          WITH KEY matnr = v_matnr.
          IF sy-subrc = 0.
            tab_ctrl1-top_line = sy-tabix.
            REFRESH it_fields.
            CLEAR returncode.
            CLEAR ok_code_0101.
          ELSE.
            MESSAGE i037 WITH it_fields-value.
            REFRESH it_fields.
            CLEAR returncode.
            CLEAR ok_code_0101.
          ENDIF.
        ENDIF.
      ENDIF.