Listing 1: Das Interface-Handling für Prefs-Dateien

struct Library *ApplicationBase;
struct PrefsObjectsIFace *IPrefsObjects;

int main()
{
  if((ApplicationBase = IExec->OpenLibrary("application.library", 50)))
  {
    if((IPrefsObjects = (struct PrefsObjectsIFace *)IExec->GetInterface(ApplicationBase, "prefsobjects", 1, NULL)))
    {
      ...
      IExec->DropInterface((struct Interface *)IPrefsObjects);
    }
    IExec->CloseLibrary(ApplicationBase);
  }
}