help in select of ppc 2003

I tried to test the example which i rebuilt for pocket pc 2003, i tried
to querry the ip of www.yahoo.com. Buit i failed. After just 1000 times 
looked carefully. I found that select always reponses 0 ( cos i test
with value of test1 ) 

 test1 = select(nfds,&read_fds,&write_fds,NULL,tvp);
 ares_process(channel,&read_fds,&write_fds);

It means that time limit expried and nothing happened. 
So in the end, i am using ethereal to capter the packet.
I found that from emulator PPC 2003, the packet to querry
send very well, and ethereal capter successful the response
from DNS.

Why the fonction select always make fd_count in &read_fds
to 0. I don't understand, cos in win32, il always differ 0.

What do you think? 
How should i do to test? 
I also try to write a client/ server in ppc 2003 and a program
ping in ppc 2003, it runs successful, and brings to me the
IP address of www.yahoo.com

Your idea is very appreciated.

Julien

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