Activate window controls for 'BAL_CNTL_CREATE'

Question

I have coded a solution to do my own logging/display logs from a custom report within transaction MPD.
the logging part works and my 'on button click' calls the logs and displays the messages using BAL_CNTL_CREATE.
however the pop up window i get, i do not get the to use the "window" control to close the popup...
i am sure i have missed off a parameter, but not having done this before, i am unsure which parameter controls the pop up window. 
if i exit out of the transaction the window closes, however i want to be able to close the window and click another button to display my log....
my code so far:
*       create dialogbox container
  CREATE OBJECT g_container
    EXPORTING
      width  = 650
      height = 100
      top    = 150
      left   = 500
    EXCEPTIONS
      OTHERS = 1.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
*       create a new log header
  CLEAR g_s_log.
  g_s_log-extnumber = 'CONSISTENCY LOG'.
  CALL FUNCTION 'BAL_LOG_CREATE'
    EXPORTING
      i_s_log      = g_s_log
    IMPORTING
      e_log_handle = g_log_handle
    EXCEPTIONS
      OTHERS       = 1.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
*       add some messages
  LOOP AT output_message INTO ls_message.
    CLEAR g_s_msg.
    g_s_msg-msgty = ls_message-msgty.
    g_s_msg-msgid = ls_message-msgid.
    g_s_msg-msgno = ls_message-msgno.
    CALL FUNCTION 'BAL_LOG_MSG_ADD'
      EXPORTING
        i_log_handle = g_log_handle
        i_s_msg      = g_s_msg
      EXCEPTIONS
        OTHERS       = 1.
    IF sy-subrc <> 0.
      MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
              WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    ENDIF.
  ENDLOOP.
*       get a display profile which describes how to display messages
  CALL FUNCTION 'BAL_DSP_PROFILE_NO_TREE_GET'
    IMPORTING
      e_s_display_profile = g_s_display_profile.
  g_s_display_profile-title     = 'Display Logs'.
  g_s_display_profile-pop_adjst = 'X'.
*       define amount of data to be displayed
  INSERT g_log_handle INTO TABLE g_t_log_handle.
*       create control to display data
  CALL FUNCTION 'BAL_CNTL_CREATE'
    EXPORTING
      i_container         = g_container
      i_s_display_profile = g_s_display_profile
      i_t_log_handle      = g_t_log_handle
    IMPORTING
      e_control_handle    = g_control_handle
    EXCEPTIONS
      OTHERS              = 1.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.

Answer 1

added this code to my method above:
SET HANDLER on_dialogbox_close FOR g_container.
and created a new method:
METHOD on_dialogbox_close.
  CALL METHOD sender->free
    EXCEPTIONS
      cntl_error        = 1
      cntl_system_error = 2
      OTHERS            = 3.
  IF sy-subrc <> 0.
  ENDIF.
all working for me!
ENDMETHOD.