WMI Minor IRPs
This section describes the Windows Management Instrumentation IRPs that are part of the WMI extensions to WDM. All WMI IRPs use the major code IRP_MJ_SYSTEM_CONTROL and a minor code that indicates the specific WMI request. The WMI kernel-mode component can send WMI IRPs any time following a driver's successful registration as a supplier of WMI data. WMI IRPs typically get sent when a user-mode data consumer has requested WMI data.
All drivers must set a dispatch table entry point for a DispatchSystemControl routine to handle WMI requests.
Drivers that do not register as WMI data providers must forward all WMI requests to the next-lower driver.
This section describes the following system-defined WMI minor function codes:
If the driver receives an IRP containing any other IRP minor function code, it should forward the IRP to the next-lower driver.