Import Hotmail/Msn Contacts using PHP library Curl

Hi All,

One of the websites we are developing at the moment requires some sort of email invitation.

The client doesn't want the user to type in all their contact list manually.

One of the solutions we are implementing is importing from an csv file, or excel.

But the client also wants the users to be able to type their Hotmail/Msn username and password and their contact list to be shown. They will be able to click on a tick box and add that to their contact list.

I have a search around the internet for solutions, but most of the things i have been finding you have to pay for scripts.

I would like to develop this myself, because I am very interested to learn about it.

Can any one help me, and point me to the write direction. (e.g. Tutorial, snippet of codes, ideas) etc.

Any help would be much appreciated.

Regards,
Vib