programming id3 tag

[mathfield]

I need a simple mechanism (in C or C++) that allow me to read/write to id3v2.3 tag info. in an mp3 file. I want to write a program that systematically change artist, title, album, year, track#, etc. I need some way to access those fields (a header and library file somewhere, perhaps?) Can anyone help?

[Aus]

id3.org should provide libs to do that actualy, just look on their site. I think they are C libs.