I am a webmaster, and there is a special place to listen to free mp3
music on my site, but i want it to be secure, or so that people would
not be able to save the "mp3 file" from the internet.  How is this
done?

The short answer is, if they can access it in its entirety there will
be a way to save it.
That being said, some places use an m3u file (playlist) that contains
info on where to find the actual mp3. A savvy user can simply look in
the file to find the actual address of the mp3 though. It would work
for most people though.

Is there a specific code to block the "right-click" on the web site?

blocking right click is just an anoying addon that can be easily 
avoided. you might want to try to turn your mp3 files into asx or
other 'streaming' audio that when yoiu save it, your only saving a
shortcut to the file. therefore if you must save and listen, it will
buffer and very impraticle. another way you can insert your mp3s into
flash files, people can still download them but it is once again
impraticle to save. but i would recomend streaming audio. to get
around that you havce to use a program called wm recorder which you
have to pay or download trial and it is hard to use and many times
unsuccesful.

So then how do you stream audio files?

Sorry, it is impossible.
lots of "direct sound recording" softwares can record streaming audio.

http://www.internet-streaming-media.com/direct-sound-recording/index.htm

How can I play songs off my web site so that they stream off my server
instead of the listeners computer downloading the whole song into the
computer in order to play it.

You can download Internet broadcasting software to stream music from
your own computer, there is a program called Sam Broadcaster - Either
way you go, if someone can hear it on there computer if they want it
they can get it. There is too much software available that can record
streaming audio, The better option is making it impraticle for people
use IE - Embed the mp3 into a flash file. Altho there is a Digital
Licence that you could aquire for a cost, not sure how much that would
work with Windows media audio .wma Files....

So then whats the add on to make the "right click" not functional?

Convert your mp3s to .rm to make the real media streaming audio. 
http://www.mp3-converter.biz/mp3-to-rm-converter-directory/

and then read this http://webdesign.about.com/od/streamingmedia/a/aa071000a.htm
about how to put them on your website. that would be the best way, its
not foolproof but hampers ALOT of easy downloading.

and do not use the rick click script, one can just view the source if
they wanted to. but if you MUST insist its.
http://www.dynamicdrive.com/dynamicindex9/noright.htm

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