In a crockpot combine chicken with water, onion, ham, amd potatoes. Cook covered on LOW for 4 to 5 hours or until chicken is done. Lift chicken out of pot; remove meat from bones. Return chicken meat to pot. Add tomatoes, beans, corn, salt, seasoned salt, sugar and pepper. Turn control to HIGH. Cover and Cook on HIGH 1 hour. Serve in large individual bowls. Makes 8 servings