Switch Search Help during runtime

Question

Hi,
Can we assign search help at runtime depending on user input? I have s drop-down box, depending on user's choice, i need to siplay different values in the search help. Can I assign search help to the screen element during runtime???
Please help.
Thanks,
Sheel

Answer 1

No, but you can build F4 help on the fly at runtime based off another field.
For example, in this program, the user enters the sales order number, and then when they do F4 on the line item, they can only choose from valid line item numbers.
report zrich_0002 .
parameters: p_vbeln type vbak-vbeln,
            p_posnr type vbap-posnr.
at selection-screen on value-request for p_posnr.
  data: begin of help_item occurs 0,
          posnr type vbap-posnr,
          matnr type vbap-matnr,
          arktx type vbap-arktx,
        end of help_item.
  data: dynfields type table of dynpread with header line.
  dynfields-fieldname = 'P_VBELN'.
  append dynfields.
  call function 'DYNP_VALUES_READ'
       exporting
            dyname               = sy-cprog
            dynumb               = sy-dynnr
            translate_to_upper   = 'X'
       tables
            dynpfields           = dynfields
       exceptions
            invalid_abapworkarea = 1
            invalid_dynprofield  = 2
            invalid_dynproname   = 3
            invalid_dynpronummer = 4
            invalid_request      = 5
            no_fielddescription  = 6
            invalid_parameter    = 7
            undefind_error       = 8
            double_conversion    = 9
            stepl_not_found      = 10
            others               = 11.
  read table dynfields with key fieldname = 'P_VBELN'.
  p_vbeln = dynfields-fieldvalue.
  call function 'CONVERSION_EXIT_ALPHA_INPUT'
       exporting
            input  = p_vbeln
       importing
            output = p_vbeln.
  select posnr matnr arktx into table help_item
                 from vbap
                      where vbeln = p_vbeln.
  call function 'F4IF_INT_TABLE_VALUE_REQUEST'
       exporting
            retfield    = 'POSNR'
            dynprofield = 'P_POSNR'
            dynpprog    = sy-cprog
            dynpnr      = sy-dynnr
            value_org   = 'S'
       tables
            value_tab   = help_item.
Regards,
Rich Heilman