Populate value into dropdownlist

Question

Is it possible to populate value of a dropdownlist?
I will want what is inside my dropdownlist to have values according to this SQL statement.
Select  distinct PROGRAM_ID from ZPROGRAM_TABLE
How am I suppose to do this? Any codes example?

Answer 1

I got an error when I put this codes:
data: itab type standard table of ZPROGRAM_TABLE WITH HEADER LINE,
wa_itab type ZPROGRAM_TABLE.
DATA : K TYPE I VALUE 1.
START-OF-SELECTION.
  CALL SCREEN 1000.
MODULE STATUS_1000 OUTPUT
MODULE STATUS_1000 OUTPUT.
  SET PF-STATUS 'SCREEN_1000'.
  SET TITLEBAR 'TITLE_1000'.
  select DISTINCT PROGRAM_ID from ZPROGRAM_TABLE
into table itab.
loop at itab.
clear wa_itab.
wa_itab-PROGRAM_ID = K .
wa_itab-PROGRAM_CODE = itab-PROGRAM_CODE.
append wa_itab to itab.
K = K + 1.
endloop.
call function 'VRM_SET_VALUES'
exporting
id = 'ZDROPDOWNLIST' "Here use your input box name in which you need dropdown
values = itab
exceptions
id_illegal_name = 1
others = 2.
ENDMODULE.                    "STATUS_1000 OUTPUT
Here is the link of how the error look like:
http://img529.imageshack.us/img529/9650/screenee6.png
Can someone tell me how to solve it and where is the error?