How to start with odbc

Hallo,
I need some helps to start with postgresql 6.4.2 and ODBC with Linux in
C language
(configuration options, hints, experiences, etc.).

Last downloaded files:
    postgresql-6.4.2.tar.gz
    postgresql.snapshot.tar.gz   (???)
    psqlodbc-025.tar.gz

Thanks in advance.
Claudio Cicognani
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Red Hat Linux 5.2
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