What do you understand by WMA format?
WMA is a file format used with Window Media Player. WMA is an audio format. It was intended to be a competitor for the MP3 and Real audio formats. These file are similar to MP3 files and primarily used for streaming music from the web.
Microsoft offer WMA format for storing files. Windows Media plays and creates WMA files. Now a days, many music player support WMA file. Windows media player adds copy protection to every WMA files you create.