> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/controls/events/check.md).

# Check

This Event is triggered when the user checks a Check Box.

#### Event available on the following operating systems

![](/files/-MGIiDGuNcrVFP-DbUma)