Using the GConf library

GConfClient — GObject-based convenience wrapper
gconf-backend
GConfEngine — a GConf "database"
GError — error reporting.
gconf-internals
gconf-listeners
GConfSchema — A GConfSchema describes a GConfEntry
gconf-sources
GConfValue, GConfEntry, GConfMetaInfo — A GConfValue stores a dynamically-typed value. A GConfEntry stores a key-value pair. A GConfMetaInfo stores metainformation about a key.
GConf Core Interfaces — Basic functions to initialize GConf and get/set values
gconf-locale
GConfChangeSet — a set of configuration changes to be made.