Filling with 0 (ceros) a field

Hi,

To do this task exists a function called CONVERSION_EXIT_ALPHA_INPUT that has only one input parameter and another for the result:

CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'
        EXPORTING
          input  = ls_selprod-Matnr
        IMPORTING
          output = ls_selprod-Matnr.

I have used this to fill parameters that must be passed into a BAPI.

& that's all,

Greetings.