Hi,

Thanks all.

>Fork (Kernel.fork), thread(Thread), or poll (see below).

I regret that I'm using Windows 2000. So I can't use Fork?
I don't know if poll is only for Unix or platform independent?

My question here is: which one can offer best performance? use thread or not 
use thread?

Thanks
Shannon

_________________________________________________________________
MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. 
http://join.msn.com/?page=features/virus