I need the simplest, way of determining if a CD I have burned is in the CD-ROM drive when someone tries to run my application from their hard disk.

Spare me the 'they'll copy it anyway' stuff...

The reason I need this is because I have 165MB of audio files (.wavs - no time to create anything smaller, so spare me that lecture too... ), and I want a warning to appear when someone tries to run the program without the CD to say something like:

"CD Not in drive, do you wish to proceed with audio deactivated?"

No = Quit program.

Simple.

Cheers,
RJ