No idea about winamp, but if you need a mp3 player for LabVIEW, you could use GAMP, the LabVIEW mp3 player, which you can find at http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&AB3096414BA2457D862568C500676FF7&cat=2E4161187E3DEB30862568660020BCC8
Hope this helps