well i want to make an internet application with vb6, regarding which i have got a couple of questions

1) i want to check that a domain is avaliable or not, like if user types www.yahoo.com it should reply that it is already booked n similar sites can be www.yahoo.net, www.yahoo.org e.t.c

2) i have an address book which contains the users e-mail address, i want to send email to all those users from my vb application.