static [EAppReturnType::Type](API\Runtime\Core\GenericPlatform\EAppReturnType__Type) Open ( EAppMsgCategory MessageCategory, [EAppMsgType::Type](API\Runtime\Core\GenericPlatform\EAppMsgType__Type) MessageType, [EAppReturnType::Type](API\Runtime\Core\GenericPlatform\EAppReturnType__Type) DefaultValue, const [FText](API\Runtime\Core\Internationalization\FText) & Message, const [FText](API\Runtime\Core\Internationalization\FText) & Title )