How to add configuration for virtual directory

This example is based on the following

apache distributed with xampp
docroot is c:/xampp/htdocs
xampp was freshly installed and no customisation in httpd.conf yet

1. edit c:\xampp\apache\conf\httpd.conf and add the following at the bottom of the file

# Virtual directory settings
Include "conf/extra/httpd-virtualdir.conf"

2. ensure that the following is present and not commented

LoadModule alias_module modules/mod_alias.so

3. edit c:\xampp\apache\conf\extra\httpd-virtualdir.conf and add the following to create the virtualdir /abc

Alias /abc "c:/someparentdir/somedir"

<Directory "c:/someparentdir/somedir">
    Options Indexes FollowSymLinks Includes ExecCGI
    Order allow,deny
    Allow from all
    Require all granted
</Directory>

</IfModule>