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EXCLUSIVE_ACCESS_REQUEST_TYPE enumeration (ntddcdrm.h)

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The EXCLUSIVE_ACCESS_REQUEST_TYPE enumeration is used to report the exclusive access state of a CD-ROM device.

Syntax

typedef enum _EXCLUSIVE_ACCESS_REQUEST_TYPE {
  ExclusiveAccessQueryState,
  ExclusiveAccessLockDevice,
  ExclusiveAccessUnlockDevice
} EXCLUSIVE_ACCESS_REQUEST_TYPE, *PEXCLUSIVE_ACCESS_REQUEST_TYPE;

Constants

 
ExclusiveAccessQueryState
A query for the access state of a CD-ROM device.
ExclusiveAccessLockDevice
A request for the CD-ROM class driver to lock a CD-ROM device for exclusive access by the caller.
ExclusiveAccessUnlockDevice
A request for the CD-ROM class driver to unlock a CD-ROM device that was previously locked for exclusive access.

Remarks

The EXCLUSIVE_ACCESS_REQUEST_TYPE enumeration is used with the IOCTL_CDROM_EXCLUSIVE_ACCESS request to query the access state of a CD-ROM device or to lock or unlock the device for exclusive access.

Requirements

Requirement Value
Header ntddcdrm.h (include Ntddcdrm.h)

See also

IOCTL_CDROM_EXCLUSIVE_ACCESS