Mark check box automatically in Multiple selection F4 help

Hi,

On using the below FM i can select multiple entries in the F4 POP UP..

  CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
    EXPORTING
      retfield        = 'P_ERNAM'
      value_org       = 'S'

multiple_choice = 'X'
    TABLES
      value_tab       = it_ernam
      return_tab      = it_return1

    EXCEPTIONS
      parameter_error = 1
      no_values_found = 2
      OTHERS          = 3.

My requirement  is to auto select few entries that i send in value tab.

In the pop up screen. ( Mark the check boxes of few entries automatically when it pop's up on F4).

What is the field that is the check box ?

Thanks and regards,

Bharathi Arasu.