Input help problem

Question

Current scenario i have an input textbox attached to an input help. A user needs to find a particular table, but do not know the exact name. The user only knows that the table starts with 'PA'. So, we need to filter all the tables that start with 'PA' for e.g. 'PA0001' and return it to the user for selection.
The problem now is that i cannot retrieve the input string given by the user for e.g. 'PA'.
Does anyone knows how to solve this problem?

Answer 1

This is my codes. The string 'PA' is not hard coded. We need to read what the user input in the textbox. For example it can be PA, PB, PC or any other input.
REPORT  ZMEIHUI_METADATA.
*& Global Declaration
DATA: IO_TABLEA(40) TYPE C,
      IO_TABLEB(40) TYPE C,
      VALUE(40) TYPE C,
      VALUE2(100) TYPE C,
      PROGNAME TYPE SY-REPID,
      DYNNUM TYPE SY-DYNNR.
*& Processing Blocks called by the Runtime environment
START-OF-SELECTION.
  CALL SCREEN 8000.
MODULE STATUS_8000 OUTPUT
MODULE STATUS_8000 OUTPUT.
  SET PF-STATUS 'UI'.
  SET TITLEBAR 'TITLE'.
ENDMODULE.                    "STATUS_8000 OUTPUT
MODULE USER_COMMAND_8000 INPUT
MODULE USER_COMMAND_8000 INPUT.
  CASE SY-UCOMM.
    WHEN 'BACK'.
      LEAVE PROGRAM. "need to change to the previous screen!!!"
    WHEN 'EXIT'.
      LEAVE PROGRAM.
    WHEN 'EXECUTE'.
     " PERFORM VALIDATE_REQUIRED_FIELD.
  ENDCASE.
ENDMODULE.                    "USER_COMMAND_8000 INPUT
MODULE F4_INPUT INPUT
MODULE F4_INPUT INPUT.
  TYPES: BEGIN OF VALUES,
    TABNAME TYPE DD02T-TABNAME,
    DDTEXT TYPE DD02T-DDTEXT,
  END OF VALUES.
  DATA: F4_VALUES TYPE TABLE OF VALUES.
  PROGNAME = SY-REPID.
  DYNNUM = SY-DYNNR.
  VALUE = IO_TABLEA.
  CONCATENATE VALUE '%' INTO VALUE2.
  SELECT DISTINCT TABNAME DDTEXT FROM DD02T
    INTO TABLE F4_VALUES WHERE TABNAME LIKE VALUE2.
  CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
    EXPORTING
      RETFIELD    = 'IO_TABLEA'
      DYNPPROG    = PROGNAME
      DYNPNR      = DYNNUM
      DYNPROFIELD = 'IO_TABLEA'
      VALUE_ORG   = 'S'
    TABLES
      VALUE_TAB   = F4_VALUES.
ENDMODULE.                    "F4_INPUT INPUT