Moving WordPress Folder

I’ve been testing out wordpress on my local apache server, because I eventually plan to move my wordpress.com blog to a self hosted wordpress blog, and I would like to be as prepared as possible for this when I do.

So, one of the things I did, was move the folder that wordpress is at. I ran the install script, got everything set up, and moved the folder. When I did, I lost all of my formatting, and using wp-admin did nothing except give me a 404 error. (Also, I was pointing my browser towards the changed folder name). When I changed the name of the folder back, it worked just fine. So, I would like to know what happened, and what I would need to do if I did want to change the name of the folder containing wordpress. Thank you.