This page will be delivered when your URL is called. He'll never know the difference, and none of your links will have to be changed. In your browser, open two or three different pages that your program has created. These links will not work once you upload to your server. If your program writes these kind of links, you will have to change each one manually.
Some programs have trouble with consistency of capitalization between links and file names.
The link must match exactly for the browser to be able to find the file online. See Naming Web Page Files. A few programs are designed so their output can only be uploaded to the manufacturer's proprietary server. To create your own genealogy website, the program must save the files it creates to your hard drive so you can upload to the server of your choice. Despite these potential problems, some programs do a very good job of creating webpages.