apache配置，配置二级域名的问题
apache配置文件httpd.conf中的已有配置如下：
# ServerName gives the name and port that the server uses to identify itself.
# This can often be determined automatically, but we recommend you specify
# it explicitly to prevent problems during startup.
#
# If your host doesn't have a registered DNS name, enter its IP address here.
#
ServerName localhost:80
#
# DocumentRoot: The directory out of which you will serve your
# documents. By default, all requests are taken from this directory, but
# symbolic links and aliases may be used to point to other locations.
#
DocumentRoot "E:/www/httpd"
<Directory "E:/www/httpd">
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
#
# Note that "MultiViews" must be named *explicitly* --- "Options All"
# doesn't give it to you.
#
# The Options directive is both complicated and important. Please see
# http://httpd.apache.org/docs/2.2/mod/core.html#options
# for more information.
#
Options Indexes FollowSymLinks Includes ExecCGI
#
# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
# Options FileInfo AuthConfig Limit
#
AllowOverride None
#
# Controls who can get stuff from this server.
#
Order allow,deny
Allow from all
</Directory> ;
现在想加一个二级域名，怎么配置？
(主域名没有在httpd.conf文件中配置，只是解析到空间的IP上了)
请问如何添加一个二级域名?
假设：
主域名为
www.aben.com(对应的物理路径为：E:/www/httpd)
空间IP为：210.120.110.119
现在想加增加的二级域名为：hao.aben.com
二级域名所对应的物理路径为：E:/www/httpd/hao
请高手赐教，救命啊，在线等
