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Есть такая библиотечка: pxlib

"pxlib is a simple and small C library for reading and writing Paradox DB files. It supports all versions starting from 3.0. It currently has a very limited set of functions, like opening a DB file, reading its header, and reading every single record. It can also extract blob data and write it to a file. Support for writing Paradox DB files is still very experimental."

Поискать надо на sf.net видел я какуюто библиотеку для dbf, забыл как называется

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Ещё можно попробовать замутить через Qt и ODBC.