# MOUSE_MASK_META

- **Language:** C
- **Kind:** constant
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/tmux.h#L1221
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-define-tmux-h-mouse_mask_meta/

```c
#define MOUSE_MASK_META 8
```

## Referenced by

- [`popup_key_cb`](/en/tmux/3.2a/reference/c-function-popup-c-popup_key_cb/) (function)
- [`server_client_check_mouse`](/en/tmux/3.2a/reference/c-function-server-client-c-server_client_check_mouse/) (function)