How to prevent WMA files from being copied to a CD?

[John TFL]

I have an extensive music library (about 1,000 + CD's) that I have loaded into my computer (for listening), I also took a copy of them to my work computer. I have a co-worker who is wanting me to share the WMA files with him, I don't mind, however I want to prevent him from burning them to a CD. Don't like him that much to give out part of my CD library. Is it possible to prevent the WMA music files from being burnt to a CD?? Preferably without added programs?? He is no too computer literate, however I want to prevent him from making a CD copy of the files, is this possible??


Thanks in advance.
Would putting the file at read only work to some degree??
I also looked at the properties of the WMA music file, under the advanced tab I see Encrypt contents to secure data, what would that do??


Thanks.
Would turning on the copy protect option in windows media player do anything??