SetActive(false) greys out all gadgets on the form, but doesn’t set their Active status, so that SetActive(true) restores the form to the precise state it was in before greying-out, that is, any inactive gadgets will still be inactive.

Greys-out all gadgets on the form and sets their active status to inactive i.e. their previous active state is lost. Similarly

greys-in all gadgets and sets their active status to active.