F4 functionality

Hi experts,

Iam working on dialog program.

I have created ITAB with kunnr,name1 fields.In the output screen field i would like to display ITAB values.

This is my program.Iam not getting values...

  CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
    EXPORTING
 *     RETFIELD    = 
      DYNPPROG    = SY-CPROG
      DYNPNR      = SY-DYNNR
      DYNPROFIELD = 'ZTAB-KUNNR'
      VALUE_ORG   = 'S'
    TABLES
      VALUE_TAB   = ITAB.

thanks

kaki