__ClassOperationEvent class

The __ClassOperationEvent system class is a base class for all intrinsic events that relate to a class.

The following syntax is simplified from Managed Object Format (MOF) code and includes all inherited properties. Properties are listed in alphabetic order, not MOF order.


class __ClassOperationEvent : __Event
  object TargetClass;
  uint64 TIME_CREATED;


The __ClassOperationEvent class has these types of members:


The __ClassOperationEvent class has these properties.

Data type: uint8 array
Access type: Read-only

Descriptor used by the event provider to determine which users can receive the event. This property is inherited from __Event.

Data type: object
Access type: Read-only

Class affected by the event. For creation events, this is the newly created class. For modification events, this is the new version of the changed class. For deletion events, this is the deleted class.

Data type: uint64
Access type: Read-only

Unique value that indicates the time at which the event was generated. This is a 64-bit value that represents the number of 100-nanosecond intervals after January 1, 1601. The information is in the Coordinated Universal Times (UTC) format. This property is inherited from __Event.

For more information about using uint64 values in scripts, see Scripting in WMI.


The __ClassOperationEvent class is derived from __Event.

Instances of __ClassOperationEvent are not created; only instances of its subclasses are created. The following classes derive from __ClassOperationEvent:





Minimum supported client

Windows Vista

Minimum supported server

Windows Server 2008


All WMI namespaces

See also

WMI System Classes
Determining the Type of Event to Receive