extern int x1f4_vset_lxfile(void **context);
x1f4_vset_lxfile function adds the symbolic constant definitions for
the file libraries into the variables collection of which address is to be read
context address and of which address (if modified by
x1f4_vset_lxfile) is to be stored back at the same
See File Open Definitions.
See Variables Collections.
The function returns
0 for success, one of variables collections
contruction errors for failure.