getting disc type

I'm writing a program in C# that I can use to index my burnt cd/dvds with so I can search them and stuff. I have been trying to find out how you can detect what type of disc is in the drive but all I can find in the Windows API is shit old functions for getting what type of floppy is in a floppy drive, nothing for cd/dvds. Anybody knows how to do this?

>>16
What >>18 had to think up for you. Anyone with half a brain would have been able to deduce that, but apparently you don't even have that much.