|D-Bus GLib bindings - Reference Manual|
libdbus proper is a low-level API, these GLib bindings wrap libdbus with a much higher-level approach. The higher level approach is possible because GLib defines a main loop, an object/type system, and an out-of-memory handling policy (it exits the program). See http://www.gtk.org for GLib information.
To manipulate remote objects, use DBusGProxy.