Next function

Artikkeli
09/15/2021

Retrieves the next property in an enumeration that begins with a call to BeginEnumeration.

Note

This API is for internal use only. It's not intended for use from developer code.

Syntax

HRESULT Next (
   [in] int               vFunc,
   [in] IWbemClassObject* ptr,
   [in] LONG              lFlags,
   [out] BSTR*            pstrName,
   [out] VARIANT*         pVal,
   [out] CIMTYPE*         pvtType,
   [out] LONG*            plFlavor
);

Parameters

vFunc
[in] This parameter is unused.

ptr
[in] A pointer to an IWbemClassObject instance.

lFlags
[in] Reserved. This parameter must be 0.

pstrName
[out] A new BSTR that contains the property name. You can set this parameter to null if the name is not required.

pVal
[out] A VARIANT filled with the value of the property. You can set this parameter to null if the value is not required. If the function returns an error code, the VARIANT passed to pVal is left unmodified.

pvtType
[out] A pointer to a CIMTYPE variable (a LONG into which the type of the property is placed). The value of this property can be a VT_NULL_VARIANT, in which case it is necessary to determine the actual type of the property. This parameter can also be null.

plFlavor
[out] null, or a value that receives information on the origin of the property. See the [Remarks] section for possible values.

Return value

The following values returned by this function are defined in the WbemCli.h header file, or you can define them as constants in your code:

Constant	Value	Description
`WBEM_E_FAILED`	0x80041001	There has been a general failure.
`WBEM_E_INVALID_PARAMETER`	0x80041008	A parameter is invalid.
`WBEM_E_UNEXPECTED`	0x8004101d	There was no call to the `BeginEnumeration` function.
`WBEM_E_OUT_OF_MEMORY`	0x80041006	Not enough memory is available to begin a new enumeration.
`WBEM_E_TRANSPORT_FAILURE`	0x80041015	The remote procedure call between the current process and Windows Management failed.
`WBEM_S_NO_ERROR`	0	The function call was successful.
`WBEM_S_NO_MORE_DATA`	0x40005	There are no more properties in the enumeration.

Remarks

This function wraps a call to the IWbemClassObject::Next method.

This method also returns system properties.

If the underlying type of the property is an object path, a date or time, or another special type, then the returned type does not contain enough information. The caller must examine the CIMTYPE for the specified property to determine if the property is an object reference, a date or time, or another special type.

If plFlavor is not null, the LONG value receives information about the origin of the property, as follows:

Constant	Value	Description
`WBEM_FLAVOR_ORIGIN_SYSTEM`	0x40	The property is a standard system property.
`WBEM_FLAVOR_ORIGIN_PROPAGATED`	0x20	For a class: The property is inherited from the parent class. For an instance: The property, while inherited from the parent class, has not been modified by the instance.
`WBEM_FLAVOR_ORIGIN_LOCAL`	0	For a class: The property belongs to the derived class. For an instance: The property is modified by the instance; that is, a value was supplied, or a qualifier was added or modified.

Requirements

Platforms: See System Requirements.

Header: WMINet_Utils.idl

.NET Framework Versions: Available since 4.7.2

Jaa