datagridview as Access-like subform

[d.s.]

I've searched the web for info on this, and evidently I'm not using
the right search words, so here goes:

I have a form which is bound to one table. I want a subform on the
parent form with will hold the contents of a child table, and filtered
by the key field of the parent data table. This is so that, when I
scroll through the parent form, the datagrid view will change content.

I've also loaded the datagridview into a tab control, as I'll have a
few of these.

I can't find how to do this. Any help appreciated.