ButtonReleaseMask 2882 lwlib/xlwmenu.c                       | ButtonReleaseMask
ButtonReleaseMask 2818 src/xmenu.c                              x, y, ButtonReleaseMask, &datap,
ButtonReleaseMask 4092 src/xterm.c    	      True, ButtonReleaseMask, &event);
ButtonReleaseMask 16559 src/xterm.c        a.event_mask = (ButtonPressMask | ButtonReleaseMask
ButtonReleaseMask  148 src/xterm.h       | ButtonReleaseMask		\
ButtonReleaseMask 2854 src/xwidget.c        a.event_mask = (ExposureMask | ButtonPressMask | ButtonReleaseMask