3D integration in VB6 for visual loading of trailor

Good afternoon all,

I am a freshman in opengl, but post this message on the advanced board, because it is you I need to help me !

A good friend of mine owns a small transport company (5 x 3.5 ton trucks). He asked me if it is possible to give him a visual tool which he can use to load all his trucks.

Within Visual Basic 6.0, I define different articles with measures (height, length, width and weight). With drag and drop, he puts the different packages in his truck.

How can this be done ? Are there any 3d programs of which I can use the objects/interface ?

There is a nice bottle of whisky involved (for me) so please be so kind and help me in the right direction !

Thanks for the help !