KeyView 24.4
KeyView Filter SDK C Programming Guide

# fpFilter()

Filters text from a document.

## Syntax

    KVErrorCode (pascal* fpFilter)(
        KVDocument pDocument,
        KVFilterOutput* pFilterOutput);

## Arguments

`pDocument` | A `KVDocument` that you created with fpOpenDocumentFromFile() or fpOpenDocumentFromStream().
`pFilterOutput` | A pointer to a KVFilterOutput structure. This structure defines the output buffer.

## Returns

The return value is an error code.

- If the call is successful, the return value is `KVError_Success` and the filtered text is stored in `pFilterOutput`.
- If the call is unsuccessful, the return value is an error code that indicates the problem.

## Discussion

- This function outputs filtered text in chunks. The first call to `fpFilter()` outputs the first chunk of filtered text to `pFilterOutput`. Call `fpFilter()` again to output the next chunk, and repeat this process to obtain all of the filtered text from the document. The final chunk does not contain any text, such that `pFilterOutput->cbText == 0`. Do not call `fpFilter()` again after this.

  IMPORTANT: Do not call any Filter API functions between calls to `fpFilter()`, because doing so might prevent filtering from resuming correctly.

- After each call to `fpFilter`, when you no longer require the data in the `pFilterOutput` structure, call fpFreeFilterOutput to free the memory allocated by this function.

Copyright 1997-2024 Open Text
Version 24.4 | Last updated September 2024

Send documentation feedback

Close

Send documentation feedback

To send feedback using your default email client, open an email window.

Otherwise, send your feedback and the information below to MFI-swpdl.idoldocsfeedback@opentext.com.

We appreciate your feedback!

Product: IDOL KeyView 24.4

Topic Title: fpFilter()