cast and pointer to function 强制和指向函数的指针
The constructor is used to form a delegate over a target object and a function pointer.
这构造器用来通过一个目标对象和一个函数指针形成一个委托。
This is done by entering just enough data to overwrite the arguments with dummy data and a new return pointer to a different function; the new function is now executed. 10
这是通过输入足够的数据来用伪数据覆盖参数，及输入到不同函数的新返回指针来实现的，现在就执行新的函数了。
You will pass two arguments to this function: the service name and the pointer to the ControlHandlerfunction.
你要将两个参数传递给此函数：服务名和指向 ControlHandlerfunction 的指针。
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