```
class Window extends Group
```

vygu Top level window [Group](Group)

`WINDOW` Kind constant

*Properties*

`TITLE` Title of teh window (string)

`MENU` Top menu ([Menu](Menu))

`MAIN` It is a main window (bool), shows up automatically
and exits application if closed

*Handlers*

`CLOSING` Called when window is about to close
Return true if closing is allowed

```
function menu($x=Tools::GET)
```

`MENU` property

```
function title($x=Tools::GET)
```

`TITLE` property