Each irp has a major and a minor function code 每个irp具有一个主要和一个次要函数代码。
The major function code indicates what sort of request the irp contains 主要函数代码指示: irp包含的请求种类。
For function code , parameters are added as properties of the variable object 对于函数代码,参数也被作为属性添加进去。
When you are finished modifying the function code , right - click the function name and select 当完成对函数代码的修改时,在函数名上单击右键并选择
With some of the major function codes , including irp _ mj _ pnp , the minor function code is required to further specify the operation 伴随一些主要函数代码,包括irp _ mj _ pnp ,次要代码被请求作更专门的操作。