+void set_task_state(Task* tsk, int state);
+void set_task_redraw(Task* tsk);
+
+Task *find_active_task(Task *current_task, Task *active_task);
+Task *next_task (Task *tsk);
+Task *prev_task (Task *tsk);
+
+void add_urgent(Task *tsk);
+void del_urgent(Task *tsk);