Mix all the eggs and add the pie filling. Slowly add the cake mix and mix well. Place the butter in a 9 X 13 inch pan. Place in the oven to melt. Grease sides of pan with the same butter. Leave melted butter in pan. Then pour the cake mixture over the butter. Bake 350 for 30 - 35 minutes. Check at 30 minutes and add time if needed. Cool and frost with your favorite frosting that matches the fruit you added to the cake mix. Cream cheese frosting usually goes well. OR Top with whipped cream when serving if you do not want a frosting on the cake. You can serve it plain too.