Not so easy lessons at DMU tutorials

We are beginning, now, some new lessons a little more complicated   at our tutorials serie.
It's available a new one, very important, about: how to create the integration between a project (2D window) and a 3D object . The exercice is simple: clicking a button, inside a project, a 3D cube will rotate or stop rotation. The important are the concepts.
All the DMU tutorials (40 until now) at:

http://www.dmu.com/crb

Thanks to all our readers (many... many...)