IF_MESSAGE is a standard SAP interface, see below for any documentation including details of methods, attributes, events etc. Interfaces are defined much the same as a class using the same transactions but act a bit like a template (in none OO terms). For example, a class would implement the interface and then inherit all of the methods etc from it. This provides a mechanism for unrelated objects to use a set of common behaviours and functionality.
You may have seen this already without knowing what it was, within SAP have you ever seen the method name prefixed by the name of an interface such as IF_MESSAGE~METHOD_NAME . This means that the class has implemented an interface and that this method has been inherited from it.
For further relevant information about this interface enter IF_MESSAGE into the relevant SAP transactions such as SE24, SE80. Also see the Resource section below to view other useful tips, screenshots, links and general information related to this SAP interface and its methods. Or even add your own for future reference
A method is a coding block that performs a certain procedure (i.e. ABAP functionality) on an object within the overall SAP class. In simple terms if the object is an SAP database table a method could be the procedure to add a record or to delete a record. If you are new to OO in many respects, the implementation of a method is similar to a function module and can be called in a very similar way using CALL METHOD.
Instead of "CALL FUNCTION", Methods are referenced using the following syntax: CALL METHOD CL_ABAP_CHAR_UTILITIES=>methodname EXPORTING/IMPORTING...
List of attributes within class IF_MESSAGE. These can be referenced using the following syntax IF_MESSAGE=>
Events are created within your class using special event handler methods. These must be registered at runtime for the event and can then be triggered using the ABAP syntax: RAISE EVENT
IF_MESSAGE - Interface for Accessing Texts from Message Objects IF_MERGE_VIEW_PPF - PPF: Interface for View Class of Action Merging IF_MERGE_SPLIT_SERVICE - Merge and Split Service IF_MERGE_PPF - PPF: Interface for Merge IF_MEREQ_MLSC_FACTORY - Factory for Multilevel Subcontracting IF_MEREQ_MLSC_ENTITY - Item Entity