File Content Extraction 25.4
Filter SDK C Programming Guide

# fpFreeString()

Frees the memory allocated by fpGetLicenseInfoAsJSON().

## Syntax

    KVErrorCode(pascal* fpFreeString)(
            char** const pszData);

## Arguments

`pszData` | A pointer to the string to free.

## Returns

The return value is an error code.

- If the call is successful, the return value is `KVError_Success`.
- If the call is unsuccessful, the return value is an error code that indicates the problem.

## Discussion

Call this function after fpGetLicenseInfoAsJSON() has successfully filled `pszLicenseInfo`, and the data is no longer required.

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Version 25.4 | Last updated October 2025

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Product: File Content Extraction 25.4

Topic Title: fpFreeString()