>The GetLogicalDriveStrings function will only return a list of drives available. You will next need to use GetDriveType function, again in Win32API to identify the type of drive. If it returns DRIVE_CDROM, you then have the drive letter of the CDROM. It may be quicker just to scan drives A to Z with this function - need to manually test to see if error occurs on non existent drive. Then stop when you find CD.

Not necessarily stop - I've managed once to add a disk and have the CD as the non-last drive. Don't remember how I did it, but I think the letter was reserved for a inaccessible network mapping, and then the CD just took that letter. I know it was something unexpected - and yet having the CD as the last drive is just a default, not a mandatory thing. So he better check all available drives if it's not only the CD he's looking for.