# SpreadsheetIsBinaryFormat

Checks if a spreadsheet is in binary format (.xls).

## Method Signature

```
SpreadsheetIsBinaryFormat(spreadsheetObj=[any])
```

### Arguments

| Argument         | Type  | Required | Description                      | Default |
| ---------------- | ----- | -------- | -------------------------------- | ------- |
| `spreadsheetObj` | `ANY` | `true`   | The spreadsheet object to check. |         |

## Examples

Check if spreadsheet is binary format:

```js
// Determine file format
var spreadsheet = SpreadsheetNew( xmlformat = false );
if ( SpreadsheetIsBinaryFormat( spreadsheet ) ) {
    println( "Binary (.xls) format" );
}
```

## Related

* [SpreadsheetIsXMLFormat()](https://boxlang.ortusbooks.com/boxlang-framework/boxlang-plus/modules/bx-spreadsheet/reference/built-in-functions/spreadsheetisxmlformat) - Check XML format
* [SpreadsheetNew()](https://boxlang.ortusbooks.com/boxlang-framework/boxlang-plus/modules/bx-spreadsheet/reference/built-in-functions/spreadsheetnew) - Create spreadsheet