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IDiscRecorder2::EnableMcn method (imapi2.h)

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Enables Media Change Notification (MCN) for the device.

Syntax

HRESULT EnableMcn();

Return value

S_OK is returned on success, but other success codes may be returned as a result of implementation. The following error codes are commonly returned on operation failure, but do not represent the only possible error values:

Return code Description
E_FAIL
 Unspecified failure.

Value: 0x80004005
E_OUTOFMEMORY
 Failed to allocate the required memory.

Value: 0x8007000E
E_IMAPI_RECORDER_COMMAND_TIMEOUT
 The device failed to accept the command within the timeout period. This may be caused by the device having entered an inconsistent state, or the timeout value for the command may need to be increased.

Value: 0xC0AA020D
HRESULT_FROM_WIN32(ERROR_INVALID_HANDLE)
 The specified handle is invalid.

Value: 6
HRESULT_FROM_WIN32(ERROR_DEV_NOT_EXIST)
 The specified network resource or device is no longer available.

Value: 55
E_IMAPI_RECORDER_LOCKED
 The device associated with this recorder during the last operation has been exclusively locked, causing this operation to failed.

Value: 0xC0AA0210

Remarks

MCN is the CD-ROM device driver's method of detecting media change and state changes in the CD-ROM device. For example, when you change the media in a CD-ROM device, a MCN message is sent to trigger media features, such as Autoplay. MCN is enabled by default. Call this method to enable notifications when the notifications have been disabled using IDiscRecorder2::DisableMcn.

Note that DisableMcn increments a reference count each time it is called. The EnableMcn method decrements the count. The device is enabled when the reference count is zero.

Requirements

Requirement Value
Minimum supported client Windows Vista, Windows XP with SP2 [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header imapi2.h

See also

IDiscRecorder2

IDiscRecorder2::DisableMcn