Unless I missed it, there is no fonction in the Windows Media Player API to get the ID3 of the file. While it's easy to do, mIRC probably uses it's own mechanism to get the ID3 of the files, either with a proprietary algorithm or with one of the several libraries out there to do that.
But someone tell me, why the heck do you play your files through mIRC? The guys at nulllsoft did a great job out of WinAmp, the best music player I know of , and they made it available 100% free
