Filtering the search help values

Question

Hi all
  I need some help regarding search help that for a normal search help for a field we will get all the possible values for that but here i need to filter the field values based on the previous field entered value.
for example :
  two fields are there
    plant and work center,
for a normal search help work center may get 100 values from a defined table.
if we enter some value in plant field and then if we press search help for the work center field then the values of the work center should be filtered based on the above entered value.
      Please help me in this issue..tell me whether it is possible or not
Thanks in advance.
siva.

Answer 1

IF not <plant field> is initial
1. Copy F4IF_SHLP_EXIT_EXAMPLE to Z, call it from your programpass the plant data to it
2. Use the changing parameters SHLP and CALLCONTROL of that FM
3. Append your plant values into shlp-selopt[] table () like shown below
data begin of s_hselopt occurs 0.
        include structure ddshselopt.
data end of s_hselopt.
  CASE callcontrol-step.
    WHEN  'SELECT'.
  LOOP AT <plant table>
    s_hselopt-shlpname  = <SHelp Name>
    s_hselopt-shlpfield = <Field Name - Wrk Ctr>
    s_hselopt-sign      = <Constant ('I')>
    s_hselopt-option    = <Constant ('EQ')>
    s_hselopt-low = <plant table-plant>
    APPEND s_hselopt.
    CLEAR s_hselopt.
  ENDLOOP.
shlp-selopt[] = s_hselopt[].
ENDCASE.