Thanks William for your prompt response.
I read the info on (http://www.httrack.com/html/dev.html), But frankly I
couldn't figure out how to re-use HTTrack within ASP.NET/C# application. 

Also, I read an old post of Xavier Roche on
(http://forum.httrack.com/readmsg/8820/8799/index.html?q=HTTrack+%2B+c%23),
stating that "Only a C/C++ interface is available" - Has this changed?
Could you please provide me an example (code) of using the Crawler
capabilities of HTTrack within web application ?
I would greatly and sincerely appreciate your help !