Added drive letter support for multiple CD-ROM drives.
Added the optional word of "open" and "close" instead of 0 or 1.
Enhanced the error handling.
Rewrote the command line parsing.
Corrected problem with "shareable" command with some CD-ROM drives.
Fixed Error checking functionality.
Added Command Line Option for closing the CD-ROM also. With the functionality to order command line in any order.
Added error checking for older CD-ROM devices.
Added informational messages for troubleshooting.