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Delegate Method

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| UndefinedColorDelegate(`ByRef</api/language/byref>` c As `Color</api/data_types/color>`) As `Boolean</api/data_types/boolean>` |

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Warning

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This item was deprecated in Xojo 2025r1 with no replacement. If a color is invalid, an `InvalidArgumentException</api/exceptions/invalidargumentexception>` will be raised.

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Specifies a delegate method that can be called when a named color is undefined.
