htaccess question

Have a quick question and looking for a quick fix.

I have an old site which has several sub domains and I will like to redirect all pages/sub domains and folders to a new site so as this;

http://www.samplsite.com/dir/abc to go to http://www.newsite.com and not http://www.newsite.com/dir/abc which it is currently doing.

Look forward to the help.

Found a fix and used this

RewriteEngine On
RewriteCond %{HTTP_HOST} ^sub.mydomain.com
RewriteRule (.*) http://www.mynewdomain.com [R=301,L]