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# CheckForWork

Checks for events to handle.

```
virtual kern_return_t CheckForWork(bool synchronous);
```

## Return Value

[`kIOReturnSuccess`](/documentation/DriverKit/kIOReturnSuccess) on success, or another value if an error occurs. See [Error Codes](/documentation/DriverKit/error-codes).

## Discussion

Don’t override this method or call it from your own code. The dispatch source uses this method internally to check for events.

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