through sub_8080E6C

include/field_message_box.h

@@ -8,5 +8,6 @@ bool8 sub_8098238(const u8 *message);
 bool8 ShowFieldAutoScrollMessage(const u8 *message);
 void HideFieldMessageBox(void);
 bool8 IsFieldMessageBoxHidden(void);
+bool8 textbox_any_visible(void);
 
 #endif // GUARD_FIELD_MESSAGE_BOX_H