Heat oven to 350°F. Grease 13x9-inch pan. In large saucepan, melt margarine and chocolate over low heat, stirring constantly. Remove from heat.
Add sweetened condensed milk and rum extract; blend well. Add eggs 1 at a time, beating well after each addition. Lightly spoon flour into measuring cup; level off. Add flour, baking powder and salt; mix well. Stir in candied fruit and pecans. Spread batter in greased pan.
Bake at 350°F. for 28 to 36 minutes or until toothpick inserted in center comes out clean. Cool 1 hour or until completely cooled. Cut into bars.