// ntddcdrm.h

typedef enum _CDROM_PERFORMANCE_REQUEST_TYPE {
  CdromPerformanceRequest,
  CdromWriteSpeedRequest
} CDROM_PERFORMANCE_REQUEST_TYPE, *PCDROM_PERFORMANCE_REQUEST_TYPE;
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Windows Driver Kit DDI reference (ne-ntddcdrm-_cdrom_performance_request_type)

_CDROM_PERFORMANCE_REQUEST_TYPE enumeration

Description

The CDROM_PERFORMANCE_REQUEST_TYPE enumeration defines the types of performance data requests. It is a member of the CDROM_PERFORMANCE_REQUEST structure, which is used as an input parameter to the IOCTL_CDROM_GET_PERFORMANCE I/O control request.

Constants

`CdromPerformanceRequest`

Requests streaming performance data.

`CdromWriteSpeedRequest`

Requests the write speed descriptor.

CDROM_PERFORMANCE_REQUEST_TYPE - NtDoc