How to display a variable in the message

Question

Hi all,
I am developing an application where I am parking a document, can anyone please tell me how can I display the document number on the web dynpro screen with the message once the document has been parked. So far I have written the following code but this is just for displaying a message only and not the number:
DATA lo_api_controller     TYPE REF TO if_wd_controller.
    DATA lo_message_manager    TYPE REF TO if_wd_message_manager.
lo_api_controller ?= wd_this->wd_get_api( ).
    CALL METHOD lo_api_controller->get_message_manager
      RECEIVING
        message_manager = lo_message_manager.
    CALL METHOD lo_message_manager->report_success
      EXPORTING
        message_text = 'Document has been parked.'

Answer 1

DATA lo_api_controller     TYPE REF TO if_wd_controller.
DATA lo_message_manager    TYPE REF TO if_wd_message_manager.
data lv_document_number    type        string.
data lv_message_string        type        string.
lo_api_controller ?= wd_this->wd_get_api( ).
    CALL METHOD lo_api_controller->get_message_manager
      RECEIVING
        message_manager = lo_message_manager.
*** get document number in lv_document_number
lv_document_number = .....
*** form message string
concatenate 'Document has been parked : Document No :' lv_document_number into lv_message_string.
    CALL METHOD lo_message_manager->report_success
      EXPORTING
        message_text = lv_message_string.