Edit the Apache configuration file (usually httpd.conf, but, it can be elsewhere. For example in Ubuntu Linux, it's /etc/apache2/apache2.conf) as follows:

Add the following to the end of the file (changing the alias and/or path as required):

Alias /ewdApps/ "d:/php/ewdApps/"

<Directory "d:/php/ewdApps">
    Options Indexes MultiViews
    AllowOverride None
    Order allow,deny
    Allow from all

Note: Even on a Windows system, use forward slash characters ( / ) in the physical path references

Save the changes and restart Apache.