Great release
What about SoB packets? Do you need them?
It'd be good if you'd make a proxy out of it.
Use dsound.dll or version.dll(this one's used on new client as standard proxy so better use dsound).
I can also give you the hook for create window(easier to handle the hwnd so you can hide/show the client with a command

(is good if you're using multiple clients)) and for multiclient if you want...