SYNTAX
------

C Syntax
^^^^^^^^

.. code-block:: c

    int MPI_Keyval_create(MPI_Copy_function* copy_fn,
        MPI_Delete_function* delete_fn, int* keyval, void* extra_state)

Fortran Syntax
^^^^^^^^^^^^^^

.. code-block:: fortran

    USE MPI
    ! or the older form: INCLUDE 'mpif.h'
    MPI_KEYVAL_CREATE(COPY_FN, DELETE_FN, KEYVAL, EXTRA_STATE, IERROR)
    	EXTERNAL COPY_FN, DELETE_FN
    	INTEGER KEYVAL, EXTRA_STATE, IERROR
