MMCFINFO Field - ulHeaderFlags

ulHeaderFlags (ULONG)

Flags that give information about the entire file.

CTOC_HF_SEQUENTIAL

Indicates that the valid entries in the CTOC table (that is, the entries that are neither deleted nor unused) are in the same order as the corresponding elements in the CGRP. If this bit is not set, the CTOC table entries might be in an arbitrary order.
CTOC_HF_MEDSUBTYPE
If this flag is set (bit value 1), then the ulMedUsage field of each CTOC table entry contains a four-character code that is a media element subtype. If the flag is not set (bit value 0), the ulMedUsage field is simply 32 bits of information that is interpreted as defined by the form type.

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