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Defining Subroutines Locate the document in its SAP Library structure

A subroutine is a block of code introduced by FORM and concluded by ENDFORM.

FORM subr [USING     p1 TYPE type

                     p2 LIKE field


                     VALUE(p3) TYPE type

                     VALUE(p4) LIKE field

                     ...                 ]

          [CHANGING { {VALUE(p1)}|{p1 [{TYPE type}|{LIKE field}]}

                      {VALUE(p2)}|{p2 [{TYPE type}|{LIKE field}]}

                      ...                                        } ]



subr  is the name of the subroutine. The optional additions USING and CHANGING define the parameter interface. Like any other processing block, subroutines cannot be nested. You should therefore place your subroutine definitions at the end of the program, especially for executable programs. In this way, you eliminate the risk of non-executable statements occurring by mistake through a subroutine closing an event block at the wrong place.

Data Handling in Subroutines

Global Data from the Main Program

Local Data in the Subroutine

The Parameter Interface


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