extern "C" a_sql_uint32 SQL_CALLBACK extfn_use_new_api( void );

The function returns an unsigned 32-bit integer. The returned value must be the interface version number, EXTFN_API_VERSION, defined in extfnapi.h. A return value of 0 means that the old, deprecated interface is being used.

If the function is not exported by the library, the database server assumes that the old interface is in use. The new interface must be used for all Unix platforms and for all 64-bit platforms, including 64-bit Windows.

A typical implementation of this function follows:

extern "C" a_sql_uint32 SQL_CALLBACK extfn_use_new_api( void )
{
    return( EXTFN_API_VERSION );
}

• an_extfn_api structure