demonstrates the usage of four different types of IOCTLs
(METHOD_IN_DIRECT, METHOD_OUT_DIRECT, METHOD_NEITHER, and
METHOD_BUFFERED)
此外,
This sample driver is not a Plug and Play driver. This is a minimal
driver meant to demonstrate a feature of the operating system. Neither
this driver nor its sample programs are intended for use in a
production environment. Instead, they are intended for educational
purposes and as a skeleton driver.