application size's problem !!1

Initially, my application release exe was 567Kb, but after I added 2 clipboard functions (not very huge in size), and them compile, and the release exe become 794kb, that is a big jump? how could it be that ? i'm sure that functions do not cost 200++kb, what could it be wrong? now even i restore the whole project with the backup version and then rebuild all, the size still remain 794kb instead of 567kb which it used to be..why ??? and I didn't touch the project setting at all...