Sim,
I put the test online so you or anybody can try it out at:
http://www.activevfp.com/avfpdemo2/default.aspx?action=test2
try the following:

CASE oProp.Action=='test2'
 SET LIBRARY TO "C:\Program Files\Microsoft Visual FoxPro 7\Foxtools.fll"
 lcSearchIP=oRequest.servervariables("REMOTE_HOST") && or REMOTE_ADDR
 store 0 to buff1,buff2,buff3,buff4,buff5,buff6
 _wsockstartup(256 * 1 + 1,@buff1,@buff2,@buff3,@buff4,@buff5,@buff6)
 _wsockgethostbyaddr(lcSearchIP,@buff1)
 _wsockCleanup()
 lcHTMLout = [The name for IP address ]+lcSearchIP+[ is ]+buff1 

>Hi Claude,
>I'm quite confused with the notes that you provided. Can you explain how to build these functions to the activevfp app? Thanks