IRP_MJ_SYSTEM_CONTROL
All drivers must provide a DispatchSystemControl routine that handles IRP_MJ_SYSTEM_CONTROL requests, which are sent by the kernel-mode component of Windows Management Instrumentation (WMI).
When Sent
The WMI kernel-mode component can send an IRP_MJ_SYSTEM_CONTROL request any time following a driver's successful registration as a supplier of WMI data. WMI IRPs typically are sent when a user-mode data consumer has requested WMI data.
Input Parameters
Depends on the value at MinorFunction in the current I/O stack location of the IRP. Every IRP_MJ_SYSTEM_CONTROL request specifies a minor function code that identifies the requested WMI action.
Output Parameters
Depends on the value at MinorFunction in the current I/O stack location of the IRP.
Operation
All drivers must support IRP_MJ_SYSTEM_CONTROL requests by supplying a DispatchSystemControl routine.
Drivers that support Windows Management Instrumentation (WMI) must handle IRP_MJ_SYSTEM_CONTROL requests by processing the minor function codes associated with this major function code. For information about the WMI minor function codes, see WMI Minor IRPs.
Drivers that do not support WMI by registering as a WMI data provider must pass IRP_MJ_SYSTEM_CONTROL requests to the next lower driver.
Requirements
Header |
Wdm.h (include Wdm.h, Ntddk.h, or Ntifs.h) |
See also
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