Subdomain Url rewrite.

[ashishhbti]

HI frineds

I am using Catch-all style for my domain by setting wildcard serveralias.

I want help in mod rewrite .

Suppose i have url www.subdomain.domain.com then i want to rewrite this url to www.domain.com?user.php?login=subdomain

That means i Want to create user profile link through subdomain .

I have seen such in most of the site like http://[username].stumbleupon.com

I have enabled the wildcard but i am having problem in mod rewrite.

Please Help .

Thanks
Ashish