Legacy Application (ANSI strings) → ODBC Driver Manager → PostgreSQL ANSI ODBC Driver → [Conversion: ANSI Code Page -> UTF-8] → PostgreSQL Server (UTF-8) → [Conversion: UTF-8 -> ANSI Code Page] → Application
DRIVER=PostgreSQL ANSI(x64); SERVER=192.168.1.100; PORT=5432; DATABASE=legacy_db; UID=appuser; PWD=secret; ClientEncoding=WIN1252; UseDeclareFetch=1; postgresql ansi odbc
Or, if both drivers are installed: