PS this is a self note!
I use to creat a working area to store the data temp and then only modify the Internal structure which is quite a hassle.
Short cut!

* Declare the type of Internal structure!
TYPES: BEGIN OF ty_report,
         SKIP(1)      TYPE C,
         SEQNO        TYPE I,
         butxt        TYPE t001-BUtxt,      " Company name
         pernr        TYPE p0761-pernr,     " PF No.
       END OF ty_report. 
* Declare the Internal table Please take note of the declaration which will help us modify the table direct
DATA: t_report TYPE STANDARD TABLE OF TY_report WITH HEADER LINE INITIAL SIZE 0. 

* the coding below is when you want to change it
    LOOP AT t_report  WHERE SKIP NE 'X'.
        t_report-butxt = 'TESTING'.
        MODIFY t_report.
    ENDLOOP. 

 
-------------
simple eh phew...

Ever wanted to send message across use this function! huhu

th_popup

with a little bit of programming you can make a program to call the function Example

*&---------------------------------------------------------------------*
*& program to call function and to message sy-uid                      *
*& Function module th_popup is being called                            *
*&---------------------------------------------------------------------*
REPORT   Y_MARK_CALLFUNCTION.
* include section -----------------------------------------------------
* declaration part ----------------------------------------------------
TABLES: SSCRFIELDS,UINFO.
DATA : CLIENT type sy-MANDT.
SELECTION-SCREEN BEGIN OF BLOCK BLK01 WITH FRAME TITLE TEXT-T01.
SELECTION-SCREEN SKIP.
PARAMETERS: "CLIENT LIKE  SY-MANDT OBLIGATORY,
            USER LIKE  SY-UNAME OBLIGATORY,
            MESSAGE LIKE  SM04DIC-POPUPMSG OBLIGATORY.
SELECTION-SCREEN SKIP.
SELECTION-SCREEN END OF BLOCK BLK01.
SELECTION-SCREEN:  BEGIN OF LINE.
SELECTION-SCREEN PUSHBUTTON (20) EXECUT USER-COMMAND EXECUT MODIF ID A.
SELECTION-SCREEN   END OF LINE.

INITIALIZATION.
  CLIENT = SY-MANDT."SY-SYSID.

AT SELECTION-SCREEN OUTPUT.
  MOVE 'Send by' TO EXECUT.

AT SELECTION-SCREEN.
  IF SSCRFIELDS-UCOMM EQ 'EXECUT' OR SSCRFIELDS-UCOMM is initial.
    SSCRFIELDS-UCOMM = 'ONLI'.
  ENDIF.
* main program  -------------------------------------------------------

START-OF-SELECTION.
  concatenate MESSAGE 'from' SY-UNAME into MESSAGE separated by space.
  CALL FUNCTION 'TH_POPUP'
    EXPORTING
      CLIENT  = CLIENT
      USER    = USER
      MESSAGE = MESSAGE.
  IF SY-SUBRC <> 0.
  ENDIF.
  RETURN.
END-OF-SELECTION.

Ever came to a screen where you cant manually enter the transactioncode "/h" ?
Now you can use the tips below.

1. Save the below command in a text file and paste the below coding

[FUNCTION]
Command=/H
Title=Debugger
Type=SystemCommand

2. Drag and drop onto the screen and walla! Debug mode on!

------------------------
tips you can play with the Command and put your own customized  / standard transaction code! :D

Thanks to my colleague Ghaffar!

Some might not understand what is this but it is just for my notes : D

DATA : IT_DETAIL TYPE TABLE OF BAPIP0006LMY,
       S_DETAIL LIKE LINE OF IT_DETAIL.
DATA : IT_DETAIL_FULL TYPE TABLE OF BAPIP0006LMY WITH HEADER LINE.

LOOP AT IT_DETAIL into S_DETAIL.

   MOVE-CORRESPONDING S_DETAIL to IT_DETAIL_FULL.
   APPEND  IT_DETAIL_FULL.

ENDLOOP.
 

Another tips from Gaafar : D 

Just got to know that we can create a break point using our sy-uname.

just add this
break   xxxxx.


" where by xxxxx. is your sy-uname also known as login name for back end sap

contributed by Gaafar ygl! :D

SE78 is the transaction code

12:40:12 PM: Koh Lee Yoong: fyi..regarding d sap menu...
12:40:28 PM: Koh Lee Yoong: whereby to add transaction..
12:40:37 PM: Koh Lee Yoong: u can use se43...n area menu should be s000