h6. [[Programmer's Reference Manuals]] h6(. » [[*Commands]] h6((. » *WhichDisc h2. *WhichDisc h4. Use This *Command returns the unique ID number for the disc in the given CD-ROM drive, or of the current drive if none is specified. h4. Syntax *WhichDisc [_drive_] h4. Parameters |<^{width:8em}. _drive_|<^. Valid CD drive number | h4. Notes None.