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MMCKINFO structure (mmiscapi.h)

  • Article

The MMCKINFO structure contains information about a chunk in a RIFF file.

Syntax

typedef struct _MMCKINFO {
  FOURCC ckid;
  DWORD  cksize;
  FOURCC fccType;
  DWORD  dwDataOffset;
  DWORD  dwFlags;
} MMCKINFO, *PMMCKINFO, *NPMMCKINFO, *LPMMCKINFO;

Members

ckid

Chunk identifier.

cksize

Size, in bytes, of the data member of the chunk. The size of the data member does not include the 4-byte chunk identifier, the 4-byte chunk size, or the optional pad byte at the end of the data member.

fccType

Form type for "RIFF" chunks or the list type for "LIST" chunks.

dwDataOffset

File offset of the beginning of the chunk's data member, relative to the beginning of the file.

dwFlags

Flags specifying additional information about the chunk. It can be zero or the following flag:

Name Description
MMIO_DIRTY
 The length of the chunk might have changed and should be updated by the mmioAscend function. This flag is set when a chunk is created by using the mmioCreateChunk function.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Header mmiscapi.h (include Windows.h)

See also

mmioAscend

mmioCreateChunk