Hello Kenneth!,
Thanks for your advise and dedication ...
Yes, you're close about what I want. I've made a form 1- N, and I'm using a Grid for the N side, but the problems I have is that I don't know how to handle inserting, deleting and updating the info in the grid.
Can I be more specific? Sure I can!, right? ;) so I'll tell you exactly what I've done.

1. I have a parent table called family (cod_family c(2), name_family c(40)) and the child table called children (cod_family c(2), cod_children c(2), name_children)
2. When we attempt to save info in the grid we automatically save the cod_family and the cod_children fields, but we enter the name_children field
3. We've determined that pressing CTRL+ENTER we will add a new row in the grid but this is not working, the name_children data isn't saved
4. When we want to delete a row in the grid, we are allowed too, but if we try to add a new row we have the error "Uniqueness of ... is violated" or something like that.

Hmmm I hope this time you'll understand well what I mean and please help! Maybe you've already noticed, but I'm not good yet programming in Visual. Thanks for your time and I'll be waiting your answer!

Rosy