Add new field to a screen

Question

Hi,
I am trying to add a new check box to a custom screen. This check box must be connected to a new custom field of KNA1 table.
I have created a new z data element (CHAR) and a new z field on KNA1.
I have created the check box on the custom screen using screen painter.
When I change the value directly to the table I can see the change to the check box.
The problem is that I can't make changes through the check box (I change the value from the checkbox but after saving, the value doesn't cange to the table).
Is something more that I have to do?
Thanks in advanced.

Answer 1

In our custom screen there are other check boxes that are not defined on FIELD statement and they functioning (when I change them, the contents of the table field changes). One of these checkboxes
is called ZZDATA_PUBLIC.
I have noticed that there is a subroutine called batch_input_0200 that has among other the following statements:
DATA: my_bdc LIKE bdcdata OCCURS 10 WITH HEADER LINE.
PERFORM bdc_field TABLES my_bdc USING 'KNA1-ZZDATA_PUBLIC'
                                kna1-zzdata_public.
there are PERFOM statements for every field on the screen.
The problem is that when I add a new PERFORM statement for my check box the program does not save the changes (When I change the value of the screen fields and save the values does not pass to the table)
the code of the form bdc_field is the following:
form bdc_field tables pt_bdcdata structure bdcdata using pw_fnam pw_fval.
  clear pt_bdcdata.
  pt_bdcdata-fnam = pw_fnam.
  pt_bdcdata-fval = pw_fval.
  append pt_bdcdata.
endform.    
can anyone help me?
Thanks
Edited by: Odysseas Spyroglou on Jun 10, 2009 8:08 AM