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RequestStateChange method of the CIM_EnabledLogicalElement class

Requests that the state of the element be changed to the value specified in the RequestedState parameter. When the requested state change takes place, the EnabledState and RequestedState of the element will be the same. Invoking the RequestStateChange method multiple times could result in earlier requests being overwritten or lost. If 0 is returned, then the task completed successfully and the use of ConcreteJob was not required. If 4096 (0x1000) is returned, then the task will take some time to complete, ConcreteJob will be created, and its reference returned in the output parameter Job. Any other return code indicates an error condition.

Important  The DMTF (Distributed Management Task Force) CIM (Common Information Model) classes are the parent classes upon which WMI classes are built. WMI currently supports only the CIM 2.x version schemas.


uint32 RequestStateChange(
  [in]  uint16              RequestedState,
  [out] CIM_ConcreteJob REF Job,
  [in]  datetime            TimeoutPeriod


RequestedState [in]

The state requested for the element. This information will be placed into the RequestedState property of the instance if the return code of the RequestStateChange method is 0 ('Completed with No Error'), 3 ('Timeout'), or 4096 (0x1000) ('Job Started'). Refer to the description of the EnabledState and RequestedState properties for the detailed explanations of the RequestedState values.

Enabled (2)

Disabled (3)

Shut Down (4)

Offline (6)

Test (7)

Defer (8)

Quiesce (9)

Reboot (10)

Reset (11)

DMTF Reserved (..)

Vendor Reserved (32768..65535)

Job [out]

Reference to the job (can be null if the task is completed).

TimeoutPeriod [in]

A time-out period that specifies the maximum amount of time that the client expects the transition to the new state to take. The interval format must be used to specify this period. A value of 0 or a null parameter indicates that the client has no time requirements for the transition. If this property does not contain 0 or null and the implementation does not support this parameter, a return code of 'Use Of Timeout Parameter Not Supported' must be returned.

Return value

Completed with No Error (0)

Not Supported (1)

Unknown or Unspecified Error (2)

Cannot complete within Timeout Period (3)

Failed (4)

Invalid Parameter (5)

In Use (6)

DMTF Reserved (..)

Method Parameters Checked - Job Started (4096)

Invalid State Transition (4097)

Use of Timeout Parameter Not Supported (4098)

Busy (4099)

Method Reserved (4100..32767)

Vendor Specific (32768..65535)




See also