File Content Extraction 25.4
Filter SDK C Programming Guide

# KVStructHead

This structure contains the current File Content Extraction version number, and is the first member of other structures. It enables OpenText to modify the structures in future releases, but to maintain backward compatibility. Before you initialize a structure that contains the `KVStructHead` structure, use the macro `KVStructInit` to initialize `KVStructHead`. The structure and macro are defined in `kvstructhead.h`.

    typedef struct _KVStructHead
    {
        WORD        version;
        WORD        size;
        DWORD       reserved;
        void        *internal;
    }
    KVStructHeadRec, *KVStructHead;

## Member Descriptions

`version` | The current File Content Extraction version number. This is a symbolic constant (`KeyviewVersion`) defined in `kvxtract.h`. This constant is updated for each release.
`size` | The size of the `KVStructHeadRec`.
`reserved` | Reserved for internal use.
`internal` | Reserved for internal use.

## Example

    KVOpenFileArgRec      openArg;
    KVStructInit(&openArg);

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Version 25.4 | Last updated October 2025

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Product: File Content Extraction 25.4

Topic Title: KVStructHead