> For the complete documentation index, see [llms.txt](https://sdk.twelite.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.twelite.info/en/twelite-net-api-expl/twenet-fur/fur.md).

# flow: System start-up

Flow at system start-up.

![](/files/-LB48BbzLGRYHP7VxdFA)

{% hint style="warning" %}
The E\_EVENT\_START\_UP event is only raised for user event processing functions.
{% endhint %}

* 始動: Starting
* システム内処理: In-system processing
* または: or
* ユーザ定義イベント処理関数: User defined event handling functions
* システムがメインループ動作を始める前に E\_EVENT\_START\_UP イベントが、ユーザ定義イベント処理関数に発生します。: The E\_EVENT\_START\_UP event is raised to the user-defined event processing function before the system starts the main loop operation.