# SpreadsheetIsXMLFormat

Checks if a spreadsheet is in XML format (.xlsx).

## Method Signature

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

### Arguments

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

## Examples

Check if spreadsheet is XML format:

```js
// Determine file format
var spreadsheet = SpreadsheetNew();
if ( SpreadsheetIsXMLFormat( spreadsheet ) ) {
    println( "XML (.xlsx) format" );
}
```

## Related

* [SpreadsheetIsBinaryFormat()](/boxlang-+-++/modules/bx-spreadsheet/built-in-functions/spreadsheetisbinaryformat.md) - Check binary format
* [SpreadsheetNew()](/boxlang-+-++/modules/bx-spreadsheet/built-in-functions/spreadsheetnew.md) - Create spreadsheet


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