# xxxGetSummaryInfo()

This function is required to extract document summary information.

## Syntax

    int  pascal _export xxxGetSummaryInfo(
        void                 *pCFContext,
        KVSummaryInfoEx      *pInfo,
        BOOL                  bFreeInfo)

## Arguments

`pCFContext` | A pointer to the global context structure for the custom reader.
`pInfo` | A pointer to a `KVSummaryInfoEx` structure defined in `kvtypes.h`.
`bFreeInfo` | A `BOOL` value indicating whether to free memory allocated for summary information.

## Returns

- Upon success, `KVERR_Success`.
- Upon error, a non-zero error code.

## Discussion

This function uses an instance of the global context structure that is different from the one used by all other reader interface functions.

This function can call the same functions used by `xxxFillBuffer()` or can be completely independent.

For more information, see Extract Metadata.

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