# on-close parameter (skin)

Source: https://ref.dm-lang.org/skin/param/on-close

### Applies to
> [Main](https://ref.dm-lang.org/skin/control/main.md) (window only)

### Format
> `string`

[Command](https://ref.dm-lang.org/skin/commands/index.md) executed when the window is closed.

### See also
- [can-close parameter](https://ref.dm-lang.org/skin/param/can-close.md)
- [on-size parameter](https://ref.dm-lang.org/skin/param/on-size.md)