ABAP - Report Program To Display SAP Inbox Content.

There is several folder in our workplace like inbox, outbox, private folder.
This simple program will display mail list in inbox folder.
Selection Screen

SELECTION-SCREEN BEGIN OF BLOCK BLC01 WITH FRAME TITLE TEXT-S10.
PARAMETERS: P_UNAME LIKE SY-UNAME OBLIGATORY DEFAULT SY-UNAME.
SELECTION-SCREEN END OF BLOCK BLC01.
Class Definition
CLASS LCL_MAIN DEFINITION.
PUBLIC SECTION.
METHODS: DISPLAY_INBOX.
* DISPLAY_MAIL IMPORTING IM_MAILID TYPE STRING.
EVENTS: MESSAGE EXPORTING VALUE(MSG1) TYPE STRING
VALUE(MSG2) TYPE STRING OPTIONAL
VALUE(MSG3) TYPE STRING OPTIONAL
VALUE(MSG4) TYPE STRING OPTIONAL.
PRIVATE SECTION.
METHODS: CLEAR_DATA,
GET_INBOX_CONTENT.
*---------------------------------
* L.O.C.A.L D.A.T.A.
*---------------------------------
DATA: USER TYPE SOUDNAMEI1,
UDAT TYPE SOUDATAI1,
FDAT TYPE SOFOLDATI1,
IT_FDAT TYPE TABLE OF SOFOLENTI1,
WA_FDAT TYPE SOFOLENTI1.

DATA: MSG1 TYPE STRING,
MSG2 TYPE STRING,
MSG3 TYPE STRING,
MSG4 TYPE STRING.

DATA: FOLD_ID TYPE SOODK.
ENDCLASS. "lcl_main DEFINITION

CLASS LCL_HANDLER DEFINITION.
PUBLIC SECTION.
METHODS HANDLE_MESSAGE
FOR EVENT MESSAGE OF LCL_MAIN
IMPORTING MSG1 MSG2 MSG3 MSG4.
ENDCLASS. "lcl_handler DEFINITION
Class Implementation
CLASS LCL_MAIN IMPLEMENTATION.
*----------------------------------------------*
* METHOD clear_data *
*----------------------------------------------*
METHOD CLEAR_DATA.
CLEAR: USER,
UDAT,
FDAT,
IT_FDAT[],
WA_FDAT,
FOLD_ID
ENDMETHOD. "clear_data

*----------------------------------------------*
* METHOD DISPLAY_INBOX *
*----------------------------------------------*
METHOD DISPLAY_INBOX.
CALL METHOD CLEAR_DATA( ).
CALL METHOD GET_INBOX_CONTENT( ).
IF IT_FDAT[] IS INITIAL.
RAISE EVENT MESSAGE EXPORTING MSG1 = 'No emails in this inbox'.
ENDIF.

ULINE AT (114).
FORMAT COLOR COL_HEADING.
WRITE: / '' NO-GAP, (020) 'Object ID' LEFT-JUSTIFIED,
'' NO-GAP, (030) 'Subject' LEFT-JUSTIFIED,
'' NO-GAP, (015) 'Date Recieved' LEFT-JUSTIFIED,
'' NO-GAP, (040) 'Sender ' LEFT-JUSTIFIED,
''.
ULINE AT /(114).
FORMAT COLOR OFF.

LOOP AT IT_FDAT INTO WA_FDAT.
FORMAT COLOR COL_NORMAL INTENSIFIED ON.
WRITE: / '' NO-GAP, (020) WA_FDAT-OBJECT_ID UNDER 'Email ID'
HOTSPOT ON,
'' NO-GAP, (030) WA_FDAT-OBJ_DESCR LEFT-JUSTIFIED,
'' NO-GAP, (015) WA_FDAT-REC_DATE LEFT-JUSTIFIED,
'' NO-GAP, (040) WA_FDAT-SEND_FNAM LEFT-JUSTIFIED,
''.
ENDLOOP.
ULINE AT /(114).
ENDMETHOD. "DISPLAY_INBOX

*----------------------------------------------*
* METHOD GET_INBOX_CONTENT *
*----------------------------------------------*
METHOD GET_INBOX_CONTENT.
MOVE P_UNAME TO USER-SAPNAME.
CALL FUNCTION 'SO_USER_READ_API1'
EXPORTING
USER = USER
* prepare_for_folder_access = 'X'
IMPORTING
USER_DATA = UDAT
EXCEPTIONS
USER_NOT_EXIST = 1
PARAMETER_ERROR = 2
X_ERROR = 3
OTHERS = 4.

IF SY-SUBRC NE 0.
CASE SY-SUBRC.
WHEN 1. MSG1 = 'User Does not exist !'.
WHEN 2. MSG1 = 'Parameter Error !'.
WHEN 3. MSG1 = 'X Error!'.
WHEN 4. MSG1 = 'Others Error !'.
ENDCASE.
RAISE EVENT MESSAGE EXPORTING MSG1 = MSG1.
ENDIF.

* Select inbox folder
MOVE UDAT-INBOXFOL TO FOLD_ID.

CALL FUNCTION 'SO_FOLDER_READ_API1'
EXPORTING
FOLDER_ID = FOLD_ID
IMPORTING
FOLDER_DATA = FDAT
TABLES
FOLDER_CONTENT = IT_FDAT
EXCEPTIONS
FOLDER_NOT_EXIST = 1
OPERATION_NO_AUTHORIZATION = 2
X_ERROR = 3
OTHERS = 4.

IF SY-SUBRC NE 0.
CASE SY-SUBRC.
WHEN 1. MSG1 = 'Folder Does not exist !'.
WHEN 2. MSG1 = 'No Authorization !'.
WHEN 3. MSG1 = 'X Error!'.
WHEN 4. MSG1 = 'Others Error !'.
ENDCASE.
RAISE EVENT MESSAGE EXPORTING MSG1 = MSG1.
ENDIF.

ENDMETHOD. "GET_INBOX_CONTENT

ENDCLASS. "lcl_main IMPLEMENTATION

CLASS LCL_HANDLER IMPLEMENTATION.

METHOD HANDLE_MESSAGE .
MESSAGE I398(00) WITH MSG1 MSG2 MSG3 MSG4.
LEAVE LIST-PROCESSING..
ENDMETHOD. "handle_message

ENDCLASS. "lcl_handler IMPLEMENTATION
Main Program
START-OF-SELECTION.
DATA: O_MAIN TYPE REF TO LCL_MAIN,
O_HANDLER TYPE REF TO LCL_HANDLER.

CREATE OBJECT: O_MAIN, O_HANDLER.
SET HANDLER O_HANDLER->HANDLE_MESSAGE FOR ALL INSTANCES.

CALL METHOD O_MAIN->DISPLAY_INBOX.
Selection Screen:

*Inbox Content:*