Should/does SQLForeignKeys work (8.03.02)?

Hi,

I am trying to retrieve the foreign keys of/to a PostgreSQL table
(PostgreSQL ODBC 8.03.02, PostgreSQL 8.3.3, unixodbc 2.2.11) using ODBC.
But whatever I try I do not get any results.

I assume that if I do

SQLForeignKeys(hstmt,
         NULL, 0,            /* Primary catalog */
         NULL, 0,            /* Primary schema */
         szTable, SQL_NTS,   /* Primary table */
         NULL, 0,            /* Foreign catalog */
         NULL, 0,            /* Foreign schema */
         NULL, 0);           /* Foreign table */

I should get all the foreign keys TO this table FROM another table.

Otherwise, doing

SQLForeignKeys(hstmt,
         NULL, 0,             /* Primary catalog */
         NULL, 0,             /* Primary schema */
         NULL, 0,             /* Primary table */
         NULL, 0,             /* Foreign catalog */
         NULL, 0,             /* Foreign schema */
         szTable, SQL_NTS);   /* Foreign table */

should get me all the foreign keys FROM this table TO another table.

BTW: I have tried it with non-null catalogs and schemas also.

Is that correct, and should it work?

TIA

Joost