Prepare cake per package directions, using a 9x13 baking pan.
While cake is baking: In a medium-size mixing bowl, mix cream cheese and sugar together until blended. In a separate bowl, mix Dream Whip per directions until light and fluffy. Place cream cheese mixture and Dream Whip in the refrigerator.
When cake has finished cooking and cooling, spread the cream cheese mixture over cake.
Pour, pie filling over cream cheese mixture. Frost carefully with the Dream Whip and refrigerate until ready to serve.