如果想开发自己的工具提示部件，那么可以将这个实现的源文件和测试页面复制到硬盘上，然后就可以修改参数、样式或代码（参见 下载）。

If so, you might want to copy the source files for the implementation and test harness onto your disk drive so you can alter the parameters, styles, or code ( see Download).

youdao

向现有方法添加新参数，只要心参数具有一默认值，这样一来，已使用该值得代码就不会发生错误或给出警告提示。

Adding a new argument to an existing method, as long as the new argument has a default value so that code that already USES it doesn't give warnings or errors.

youdao