You read the whole tutorial in 4 minutes? There is more than one page, you know. That whole website is for learning c++ with hundreds of pages. There is no way you read it all in 4 minutes. Learning C++ is not going to take a matter of minutes. It will take weeks (if you are really set on learning it and try hard) to months to learn and years to perfect.
By the way, try dbMakeObjectCube(...). Spelling and capital letters matter.
Also, take a look at the documentation: "<Drive>:\Program Files\The Game Creators\Dark GDK\Documentation\Dark GDK.chm"
That has all of the functions documented in Dark GDK.
Please put some effort into learning C++ first or plainly give up, because sooner or later everyone will get sick of you asking for help with not even a little bit of C++ knowledge.
EDIT: Sorry jezza I have a history of beating people in under a minute or two
#ifdef _DEBUG
FixBugs(All);
#endif