Importing Thunderbird mail and contacts to WLM

Hi

perhaps this is the wrong forum but I will ask here first.

I installed Thunderbird on my Vista PC for various reasons but my wife dislikes it and wants to revert to WLM or Windows Mail.

Can anyone let me know how to get the Emails and Contacts from the Thunderbird installation, one of the email addresses is Gmail and the other is BigPond (an Australian ISP)

Thanks for any help and advice.

Cheers

Daniel