Thank you Greg.

> You don't need the Thread Manager, you can just do all the TCP work on idle
> events.

In case some application doesnot give cpu time to other applications, that
code work well? For example, some app show a modal dialog or non-background
print work, I think TCP session will be timed out or buffer will be
overflow...

Anyway, thank you for your great code and kind advice.

Osamu Shigematsu