# format_cb

- **Language:** C
- **Kind:** typealias
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/tmux.h#L1978
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-typedef-format_cb/

```c
typedef void *(*format_cb)(struct format_tree *);
```

## Referenced declarations

- [`format_tree`](/en/tmux/3.2a/reference/c-struct-format_tree/) (struct)