Heat oven to 350 degrees F. Grease bottom and sides of 13x9 baking pan.
In large bowl, mix white sugar, butter or margarine, and vanilla extract. Stir in flour. Press dough in bottom and 1/2 inch up sides of pan. Bake 15 to 17 minutes or until edges are light brown.
In medium bowl, beat brown sugar, corn syrup, vanilla extract, salt, and eggs with spoon. Stir in pecans. Pour over crust.
Bake 25 to 30 minutes until set. Loosen edges while still warm. Cool completely, about 1 hour.