What does it do? In this variant of the statement FORM the definition of a subroutine subr is shared between a declaration part and an implementation part:
The statement FORM subr DEFINITION declares the subroutine and its parameter interface. The meaning of the additions is the same as in FORM. A subroutine declaration of this type is part of the global declaration part of a program.
The subroutine is implemented between the statements FORM subr IMPLEMENTATION and ENDFORM. These statements define a processing block in the implementation part of the program.
Latest notes: This variant of defining a subroutine is not supported by all tools and should be avoided. BEGIN_SECTION SAP_INTERNAL_HINT It remains from the operational package concept in <(>NGAP<)>. It should have been deleted already there. The availability in the <(>7.xx<)> releases is due to an error during backport. END_SECTION SAP_INTERNAL_HINT ABAP_HINT_END
