here
code:
var mainMessage=WMP.currentMedia.getItemInfo("title") + " - " + WMP.currentMedia.getItemInfo("author") + " --- ";
there are more tags for getItemInfo function:
* Author
* AverageLevel
* Bitrate
* CurrentBitrate
* Duration
* FileSize
* FileType
* ID3/TMED
* Is_Protected
* Is_Trusted
* IsVBR
* MediaType
* PeakValue
* SourceURL
* Title
* type
* WM/AlbumTitle
* WM/AudioFileURL
* WM/AudioSourceURL
* WM/AuthorURL
* WM/Genre
* WM/GenreID
* WM/Track
* WM/TrackNumber