Delete clipping part of 2 objects?

[Florens]

Hello I'm kind of new to modelling and I thought wings 3d would be a good software to start with. But I couldn't find the right solution to this problem.

I am trying to have: for example a cube which I want to cut a hole out of. I am trying to do this by placing another object inside it and than I am trying to delete it with the part of the other object.

example in the attachments

Help is appreciated!