cd "C:\Program Files (x86)\Apache2\bin"

openssl req -config ../conf/openssl.cnf -new -out XXX.csr -keyout XXX.pem

>> Fill in "PEM pass phrase" and "Common Name"

openssl rsa -in XXX.pem -out XXX.key

>> Delete the .rnd file

openssl x509 -in XXX.csr -out XXX.cert -req -signkey XXX.key -days 365

LoadModule ssl_module modules/mod_ssl.so

<IfModule ssl_module>
Include conf/extra/httpd-ssl.conf
</IfModule>

NameVirtualHost *:443

>> Copy XXX.key and XXX.cert to conf/ssl
>> More information http://www.neilstuff.com/apache/apache2-ssl-windows.htm