[Mediawiki-l] Custom user create with additional fields

[Alain]

Hi,

I would like to extend the user create form with some fields which get 
e-mailed to the site administrator on the creation of the account.

I can use the CustomUserCreateForm to add the extra from fields, but 
what would be the best way to have the data in those fields be send 
through e-mail?

Thanks,

Alain