result = XGetWindowProperty(_display, win, atom, 0l, 1l, False,
AnyPropertyType, &ret_type, &ret_size,
&nelements, &ret_bytes, &c_val);
result = XGetWindowProperty(_display, win, atom, 0l, 1l, False,
AnyPropertyType, &ret_type, &ret_size,
&nelements, &ret_bytes, &c_val);