Add a URL to a post in code

[Exeter]

I am auto generating threads using this:

	$newpost['message'] = "Something www.google.com somemore"; 
	...
	build_new_post('thread', $foruminfo, array(), array(), $newpost, $errors);

The threads get generated, but the www.google.com part appears in plan text, not as a blue hyper link. Adding vB code and html tags does not help.

How do I need to encode the string for the build_new_post function to pic this up?

Thanks