Irrlicht Engine

hello everybody,
I have a probleme i made a GUI but i would like to clear it, how can i do ?
Like Device.SceneManager.Clear(); but for Device.GUIEnvironment.

Thanks

hi,
i have been beginning irrlicht for 3 hours and i have a trouble with camera rotation.
I am using ode and i would like to put physic on a camera.
For the physic i am using ODE.




#include <irrlicht.h>

using namespace irr;
using namespace core;
using namespace scene;
using namespace video ...