Combine crumbs, 3 tablespoons of sugar and margarine. Press into bottom of a 9 inch pan. Bake at 325 degrees for 10 minutes. Combine cream cheese and 3/4 cup sugar at medium speed until well blended. Add eggs, one at a time, mixing well after each addition. Blend in vanilla. Pour over crust. Bake at 325 degrees for 40 minutes. Loosen cake from rim of pan, cool before removing rim of pan. Chill. Top with pie filling before serving. Randy Rigg