第二个参数我们传0进去，这个参数是指定用来创建新设备扩展的字节数的。

The second parameter we passed 0, and it says to specify the number of bytes to create for the device extension.

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API来支持扩展插件输入设备扩展点到插件API(用于远程控制，等等。)

Extend Addons API to support input devices extension point to the Addons API (for remote controls, etc.)

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您是否想过如何将应用程序的影响范围扩展到多个客户机设备？

Have you ever wondered how to expand the reach of your applications to multiple client devices?

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