[vtkusers] How to use the arrow keys

[David Brayford]

I am trying unsuccessfully to find the command to use the arrow keys.

char keycode=iren->GetKeyCode();
	switch (keycode)
	{
		case 'ARROW_UP':
		{
			break;
		}
		case 'ARROW_DOWN':
		{
			break;
		}
    }

Thanks
David