# Extract Deleted Text Marked by Tracked Changes

The revision tracking feature in applications—such as Microsoft Word's Track Changes—marks changes to a document (typically, strikethrough for deleted text and underline for inserted text) and tracks each change by reviewer name and date.

If revision tracking was enabled when text was deleted from a source document, you can configure Filter to extract the deleted text. Filter does not extract the reviewer name and revision date.

To extract deleted text from a document and include it in the filtered output

1. Call the fpInit() or fpInitWithLicenseData() function.

2. Call the fpFilterConfig() function with the following arguments:

   Argument | Parameter
   --- | ---
   `nType` | `KVFLT_INCLREVISIONMARK`
   `nValue` | `TRUE`
   `pData` | `NULL`

   For example:

       (*fpFilterConfig)(pKVFilter, KVFLT_INCLREVISIONMARK, TRUE, NULL);

3. Call the fpFilterFile() or fpFilterStream() function.

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