# popup_data.arg

- **Language:** C
- **Kind:** attribute
- **Source:** https://github.com/tmux/tmux/blob/e476c1230b958df0cb12977517d24b3dc931375b/popup.c#L51
- **Page:** https://libtmux.org/en/tmux/3.7c/reference/c-struct-popup_data-arg/

```c
void * arg;
```

## Referenced by

- [`popup_display`](/en/tmux/3.7c/reference/c-function-popup_display/) (function)
- [`popup_free_cb`](/en/tmux/3.7c/reference/c-function-popup-c-popup_free_cb/) (function)