Preheat the oven to 350 degrees. Place the stick of butter in a glass 9x13 baking dish and sit in the oven to melt the butter while mixing the ingredients. In a mixing bowl combine the flour, milk and sugar, mix well. Take the baking dish out of the oven and pour the batter in on top of the melted butter. Drop spoonfuls of the fruit pie filling throughout the batter evenly. Bake for 40-45 minutes or until golden brown.