# control_sub_windows_RB_PREV

- **Language:** C
- **Kind:** function
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L199
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-function-control-c-control_sub_windows_rb_prev/

```c
static struct control_sub_window * control_sub_windows_RB_PREV(struct control_sub_window *elm)
```

## Parameters

- `elm` (`struct control_sub_window *`)

## Referenced declarations

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