Hello, well let me explain from the begining what im tryin to do:

I have four tables:
1. for the user
2. for the pc
3. for the license in an equipment
4. the software.


What i need to do for example is in an form show the user, the pc that he has (he can has more than 2 pcs), and that pc can have many licences.

So, i'll need to show in a grid all the pc that this user have in other grid or in the same show the licenses that the pc has.

And when i push the prev or the next button refresh the grids and if you push the add button you can add the user, the pcs that he has and the licenses that it could has, in those grids.

Thanks for trying to help me.