params::InterfaceGlRef mParams;
config::ConfigRef     mConfig;

params::InterfaceGl::create( getWindow(), "Settings", toPixels( Vec2i( 400, 550 ) ) );
mConfig = config::Config::create(mParams);

mConfig->addParam("Bool type parameter", &boolParam);
mConfig->addParam("Float type parameter", &floatParam);
mConfig->addParam("Double type parameter", &doubleParam);
mConfig->addParam("Int type parameter", &intParam);
mConfig->addParam("Quatf type parameter", &quatfParam);
mConfig->addParam("Enum type parameter", enumNames, &enumValue);
...
mConfig->save( getAppPath() / fs::path("config.xml") );
...
mConfig->load( getAppPath() / fs::path("config.xml") );