Hi i need help from u ........people.........

Question

hi,
i  need some answers.......
Q1. how to open a session from the report without going into the SM35?
Q2.how to modify the script without modifying the predefined print program using form routines?procedure please?
Q3.if we want to copy the fields into the target table which has not suffiecient memory space,then  how can we copy those fields?
Q4. see the fields given below
              f1      f2        f3      f4
1            a       b         a       d
2            c       b         c       a
3            b        b         a       d
4            c        b         a        d
if we say AT NEW  F2  and ON CHANGE OF F2  what happens ? and wt is the no of triggering?
regards
vishnu vardhan k.v.

Answer 1

Q1) Use the function module BDC_OPEN_GROUP
                                          BDC_INSERT
                                          BDC_CLOSE_GROUP
Q2)........................
You can use the PERFORM command to call an ABAP subroutine (form) from any program, subject to the normal ABAP runtime authorization checking. You can use such calls to subroutines for carrying out calculations, for obtaining data from the database that is needed at display or print time, for formatting data, and so on.
PERFORM commands, like all control commands, are executed when a document is formatted for display or printing. Communication between a subroutine that you call and the document is by way of symbols whose values are set in the subroutine.
Syntax in a form window:
/: PERFORM <form> IN PROGRAM <prog>
/: USING &INVAR1&
/: USING &INVAR2&
/: CHANGING &OUTVAR1&
/: CHANGING &OUTVAR2&
/: ENDPERFORM
INVAR1 and INVAR2 are variable symbols and may be of any of the four SAPscript symbol types.
OUTVAR1 and OUTVAR2 are local text symbols and must therefore be character strings.
The ABAP subroutine called via the command line stated above must be defined in the ABAP report prog as follows:
FORM <form> TABLES IN_TAB STRUCTURE ITCSY
OUT_TAB STRUCTURE ITCSY.
ENDFORM.
The values of the SAPscript symbols passed with /: USING... are now stored in the internal table IN_TAB . Note that the system passes the values as character string to the subroutine, since the field Feld VALUE in structure ITCSY has the domain TDSYMVALUE (CHAR 80). See the example below on how to access the variables.
The internal table OUT_TAB contains names and values of the CHANGING parameters in the PERFORM statement. These parameters are local text symbols, that is, character fields. See the example below on how to return the variables within the subroutine.
Q4)
  Those will not be triggered in the case of Onchage of F2.
  But it will get triggered in the case of AT NEW F2.
b'coz at new is  a group based operation...
  till f2 if any change occurs in the left handside fields then this will be triggered for that record...
  and all the right hand side fields contains ***** as their values....
reward if it helps u.....
sai ramesh