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# CancelScan Method of the ScanSource Object

<Note>
  This method is implemented in FRE for Windows.
</Note>

This method cancels the asynchronous scanning operation.

## Syntax

### C++

```cpp theme={null}
HRESULT CancelScan();
```

## Return values

This method may return the [standard return values of ABBYY FineReader Engine functions](/fine-reader/engine/api-reference/return-codes).

## See also

[ScanSource](/fine-reader/engine/api-reference/mechanism-objects/scansource)