datagrid auto-save

Hi everybody,
In MS Access, when we go from a row to another,
the "dirty" records are saved automatically.

How to do the same with a datagrid (in a windows form)?

Simply we don't like that buttons (Load, Cancel All, etc).

So,
1) How to find if a row (in a datagrid) is dirty?
2)Which is the datagrid event which is fired when we move
from one row to another?

Thank you,
Ionel