Hardware Dev Center

System-Defined I/O Function Codes

This section describes the system-defined function codes for I/O requests. These function codes specify Plug and Play, power management, Windows Management Instrumentation (WMI), and other types of I/O operations.

This section includes the following topics:

IRP Major Function Codes

Plug and Play Minor IRPs

Power Management Minor IRPs

WMI Minor IRPs



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