The ``++CONST++`` keyword on a subprocedure's parameter indicates that the parameter value will not be changed by the subprocedure. This is not just a nice way to communicate with the programmers who will call the procedure. It also offers performance benefits, because it allows the compiler to produce more optimized code. Further, using ``++CONST++`` means that a field of a similar data type will automatically be converted to the correct type and size for the parameter.
