. What are macros?

Macros are nothing but a piece of X++ code that can be used in several places. Advantage is there maintenance can be done from one place.
MorphX has built in macro preprocessor. Basically there are 3 kinds of macros:

1. Stand-alone macro: It is created using the macro-node of the AOT.
2. Macro library: It is a stand alone macro which contains local macros.
3. Local Macro: A local macro is declared with in a method or stand alone macro