> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# XLFileFormatEnum

XLFileFormatEnum enumeration constants are used to denote available formats of the output XLS files.

```
typedef enum {
 XLFF_BIFF8,
 XLFF_BIFF5,
 XLFF_DoubleStream
} XLFileFormatEnum;
```

## Elements

| Name                 | Description                                                                                                             |
| -------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| XLFF\\\_BIFF5        | This format is previous to the XLFF\\\_BIFF8 one and may be used for compatibility with the older versions of MS Excel. |
| XLFF\\\_BIFF8        | This is a newer format of XLS-formatted clipboard data.                                                                 |
| XLFF\\\_DoubleStream | Both formats (MS Excel 5 and 8 versions) are saved to the same file.                                                    |

## Used in

[IXLExportParams::XLFileFormat](/fine-reader/engine/api-reference/parameter-objects/export-parameters/xlexportparams#xlfileformat)