PREHEAT oven to 350° F. Grease 13 x 9-inch baking dish.
COMBINE milk, flour, sugar, butter, baking powder, cinnamon and salt in medium bowl; stir until just blended. Spread into prepared baking dish. Combine apple pie filling and cranberries in medium bowl; spread evenly over batter. Carefully pour hot water over fruit.
BAKE for 45 to 50 minutes. Serve warm with whipped topping.