> 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

Kalipso - Form - Controls  - Events - Check

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

#### Event available on the following operating systems

![](https://3821468174-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LrTlA1suFa5N48x_83N%2F-MGIW3wIXgRupIGNu8-p%2F-MGIiDGuNcrVFP-DbUma%2FTodos.PNG?alt=media\&token=406123c5-e2bb-4ec6-8044-9533b8686f6f)