rb_define_method (c, "type", c_type_get, 0);
rb_define_method (c, "type=", c_type_set, 1);
rb_define_method (c, "window=", c_window_set, 1);
rb_define_method (c, "type", c_type_get, 0);
rb_define_method (c, "type=", c_type_set, 1);
rb_define_method (c, "window=", c_window_set, 1);