# control_sub_windows_RB_NFIND

- **Language:** C
- **Kind:** function
- **Source:** https://github.com/tmux/tmux/blob/e476c1230b958df0cb12977517d24b3dc931375b/control.c#L199
- **Page:** https://libtmux.org/en/tmux/latest/reference/c-function-control-c-control_sub_windows_rb_nfind/

```c
static struct control_sub_window * control_sub_windows_RB_NFIND(struct control_sub_windows *head, struct control_sub_window *elm)
```

## Parameters

- `head` (`struct control_sub_windows *`)
- `elm` (`struct control_sub_window *`)

## Referenced declarations

- [`control_sub_window`](/en/tmux/latest/reference/c-struct-control_sub_window/) (struct)
- [`control_sub_windows`](/en/tmux/latest/reference/c-struct-control_sub_windows/) (struct)