Hi Nadya.

>> 1)Will it work for navigation buttons too? <<

You'd need to abstract the logic to a higher level, like maybe the form <s>. You'd have to call the ValidateCurrentRow() method from each of your nav buttons. But yeah, it should work with some modification.

>> 2) Can I use form's properties instead of grid's properties? <<

I would say that you should use form properties (and methods) if you are going to have other objects on the form ( your nav buttons ) using this logic as well.