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  "identifier" : "/documentation/AppKit/NSEvent/keyCode",
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  "role" : "Instance Property",
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  "title" : "keyCode"
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# keyCode

The virtual code for the key associated with the event.

```
var keyCode: UInt16 { get }
```

## Discussion

Raises an `NSInternalInconsistencyException` if sent to a non-key event.

The property’s value is hardware-independent. The value returned is the same as the value returned in the `kEventParamKeyCode` when using Carbon Events.

## See Also

[`keyEvent(with:location:modifierFlags:timestamp:windowNumber:context:characters:charactersIgnoringModifiers:isARepeat:keyCode:)`](/documentation/AppKit/NSEvent/keyEvent(with:location:modifierFlags:timestamp:windowNumber:context:characters:charactersIgnoringModifiers:isARepeat:keyCode:))

Creates and returns a new event object that describes a key event.


---

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