As said Cyber, you don't have to configure WAMP for that. If your domain name points on your Ip adress then, it will work.
Now if you want, you can configure a Virtualhost in Apache, so you will be able to manage multiple domain names.
For MySQL, there's really nothing to do.
If you have a dynamic IP, you will need to use a dynamic DNS system like DynDNS.
If you have a router, you will need to
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