SYNOPSIS
#include <paradox.h>
int PX_add_primary_index(pxdoc_t *pxdoc, pxdoc_t *pindexdoc)
DESCRIPTION
Assigns an primary index to a database file. The primary index must be loaded before as any Paradox file with PX_open_fp(3) or PX_open_file(3). pxdoc must be a Paradox database file. In order to be able to use the index you will have to call PX_read_primary_index(3) before accessing any record data.
RETURN VALUE
Returns 0 on success and -1 on failure.