# tmux.Session.ActiveWindow

- **Module:** tmux.Session
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/relations.go#L11
- **Page:** https://libtmux.org/reference/go/tmux-session-activewindow/

```
tmux.Session.ActiveWindow() -> (Window, bool)
```

ActiveWindow returns this session's sole active winlink from the materialized snapshot. It never queries tmux; use [Session.ResolveActiveWindow] for live state.