How to change the port number of wamp(apache) server on windows machine

To change the port number of apache server , go tto the httpd.conf file and change the port number to the available port number(8080 or 8081).
If it is a wamp server u will find the httpd.conf file at this path
C:\wamp\bin\apache\Apache2.2.11\conf\httpd.conf
Open this file with note pad and change the port numbers.
or start the wamp server and u will find the apache icon in the tray(right hand bottom corner). Click on the icon and go to apache and and there u the httpd.conf file. Open this file and change the port number.