NCURSES_BUTTON_RELEASED
mmask_t release = (mmask_t) NCURSES_MOUSE_MASK(b3, NCURSES_BUTTON_RELEASED);
#define BUTTON1_RELEASED NCURSES_MOUSE_MASK(1, NCURSES_BUTTON_RELEASED)
#define BUTTON2_RELEASED NCURSES_MOUSE_MASK(2, NCURSES_BUTTON_RELEASED)
#define BUTTON3_RELEASED NCURSES_MOUSE_MASK(3, NCURSES_BUTTON_RELEASED)
#define BUTTON4_RELEASED NCURSES_MOUSE_MASK(4, NCURSES_BUTTON_RELEASED)
#define BUTTON5_RELEASED NCURSES_MOUSE_MASK(5, NCURSES_BUTTON_RELEASED)