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# EventKitUI Constants

## Topics

### Constants

[`#define EKUI_EXTENSION_AVAILABLE_IOS(_vers, _msg)`](/documentation/EventKitUI/EKUI_EXTENSION_AVAILABLE_IOS)

[`#define EKUI_HAS_HEADER(include_path)`](/documentation/EventKitUI/EKUI_HAS_HEADER)

[`var EKUI_IS_IOS: Int32`](/documentation/EventKitUI/EKUI_IS_IOS)

[`var EKUI_IS_SIMULATOR: Int32`](/documentation/EventKitUI/EKUI_IS_SIMULATOR)

[`#define EVENTKITUI_CLASS_AVAILABLE(_iphoneIntro)`](/documentation/EventKitUI/EVENTKITUI_CLASS_AVAILABLE)

[`#define EVENTKITUI_EXTERN`](/documentation/EventKitUI/EVENTKITUI_EXTERN)


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