Include files

The following header file is required in any file containing these library routines.

#include "global_extern.h"

And it references

#include "global_extern_proto.h"

Special Note

Make sure you use the proper define in the global_extern.h header file, namely:

#define USERD_API_300

And, also make sure the API version in the USERD_get_reader_version routine is set to the desired version.

Unless explicitly stated otherwise, all arrays are zero based - in true C fashion.

Global variables

A big win of the new API 3.0 is that you no longer need globals. Simply populate a struct and its pointer is passed in and out of the USERD routines as shown in USERD_reader_open, below.