// ntddcdvd.h

typedef struct _DVD_REGION {
  UCHAR CopySystem;
  UCHAR RegionData;
  UCHAR SystemRegion;
  UCHAR ResetCount;
} DVD_REGION, *PDVD_REGION;
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Windows Driver Kit DDI reference (ns-ntddcdvd-_dvd_region)

_DVD_REGION structure

Description

The DVD_REGION structure is used in conjunction with the IOCTL_DVD_GET_REGION request to retrieve region playback control (RPC) information for a DVD device.

Members

`CopySystem`

Indicates the copyright protection type. For more information about copyright protection types, see the SCSI Multimedia Commands - 3 (MMC-3) specification.

`RegionData`

Indicates the region code of the currently mounted DVD media. This is an eight-bit bitmask, with one bit for each DVD region. A value of 0x00 means that no region is specified.

`SystemRegion`

Indicates the region code of the DVD player. This is an eight-bit bitmask, with one bit for each system region. A value of 0x00 means that no region is specified.

`ResetCount`

Indicates the remaining number of times the DVD device's region code can be changed by the user. This member can hold a value between 0 and 7.

DVD_REGION - NtDoc