Bake a sheet cake according to directions on box. After it cools, poke holes in cake, (the handle of a wooden spoon works well) and pour the thawed strawberries and juice on to the cake so the berries and juice go into the holes. Spread them around until the cake is covered. Then smooth the prepared French Vanilla pudding over the berries, sealing them, Ice the cake with the cool whip and enjoy! Keep refrigerated for best flavor.