WM_XBUTTONUP     4823 src/w32fns.c       case WM_XBUTTONUP:
WM_XBUTTONUP     4878 src/w32fns.c         return (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONUP);
WM_XBUTTONUP     3289 src/w32term.c      case WM_XBUTTONUP:
WM_XBUTTONUP     5387 src/w32term.c  	case WM_XBUTTONUP: