Int 2F Fn 5711  U - Iomega Drivers - Lock Media In Drive                   [d]

   AX = 5711h
   BX = program ID??? (0201h used by GUEST.EXE)
   DX = 496Fh ('Io')

Return: CF clear if successful (storage medium in drive)
       AX = new lock count
   CF set on error (drive empty)

See Also: AX=5700h,AX=5701h,AX=5710h,AX=5712h