MI_Session_QueryInstances function

Queries for a set of instances based on a query expression.


 MI_INLINE void MI_Session_QueryInstances(
  _In_     MI_Session               *session,
           MI_Uint32                flags,
  _In_opt_ MI_OperationOptions      *options,
           _In_opt_z_ const MI_Char *namespaceName,
           _In_opt_z_ const MI_Char *queryDialect,
           _In_opt_z_ const MI_Char *queryExpression,
  _In_opt_ MI_OperationCallbacks    *callbacks,
  _Out_    MI_Operation             *operation


session [in]

Session handle returned from MI_Application_NewSession.


Runtime type information (RTTI) and polymorphic flags.

options [in, optional]

Optional MI_OperationOptions value that specifies options such as timeouts and how to control the CIM semantics. Specify Null if no operation options are to be sent.


An optional, null-terminated string that represents the namespace name to carry out the operation. If none is specified, the server will pick a default. The namespace cannot include a computer name. It can only be in the form of a namespace name separated by a slash mark character (/). For example, the following would be a valid namespaceName value: root/cimv2.


An optional, null-terminated string that represents the dialect of the query being passed. This value can be either WQL or CQL. Note that some servers do not support all query types.


An optional, null-terminated string that represents the query expression to be carried out. Usually a query is needed, but if a WS-Management endpoint is being used, a resource URI can be passed. For WMI DCOM transport, this value must be specified.

callbacks [in, optional]

Optional MI_OperationCallbacks structure that defines the operational callbacks to receive the instance result and CIM semantics. To carry out the operation asynchronously, the structure's instanceResult callback member must be specified. If this structure member is not specified, the client must call the MI_Operation_GetInstance function to retrieve the results.

operation [out]

Returned operation handle that must be closed via MI_Operation_Close once complete. Calling MI_Operation_Cancel before it is complete will cause the operation to shutdown. MI_Operation_Close and MI_Operation_Cancel can be called from any operation.


Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012


Windows Management Framework 3.0 on Windows Server 2008 R2 with SP1, Windows 7 with SP1, and Windows Server 2008 with SP2



See also