Well Lefty,
guess you will remain the one and only who will ever use this wrapper. You ask for money, think twice, we don't even have something real to test yet. Your codebox above is just pseudo code without providing sigil.bi to us.
And if you don't wanna release your source here, then you should at least create a reasonable demo program and provide the compiled EXE of it together with some more useful info, because nobody will buy the cat in a poke.