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BeginEnumeration function

  • Artikkeli

Resets an enumerator back to the beginning of the enumeration.

Note

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

Syntax

HRESULT BeginEnumeration (
   [in] int               vFunc,
   [in] IWbemClassObject* ptr,
   [in] LONG              lEnumFlags
);

Parameters

vFunc
[in] This parameter is unused.

ptr
[in] A pointer to an IWbemClassObject instance.

lEnumFlags
[in] A bitwise combination of the flags or values described in the Remarks section that controls the properties included in the enumeration.

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_INVALID_PARAMETER 0x80041008 The combination of flags in lEnumFlags is invalid, or an invalid argument was specified.
WBEM_E_UNEXPECTED 0x8004101d A second call to BeginEnumeration was made without an intervening call to EndEnumeration.
WBEM_E_OUT_OF_MEMORY 0x80041006 Not enough memory is available to begin a new enumeration.
WBEM_S_NO_ERROR 0 The function call was successful.

Remarks

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

The flags that can be passed as the lEnumFlags argument are defined in the WbemCli.h header file, or you can define them as constants in your code. You can combine one flag from each group with any flag from any other group. However, flags from the same group are mutually exclusive.

Group 1

Constant Value Description
WBEM_FLAG_KEYS_ONLY 0x4 Include properties that constitute the key only.
WBEM_FLAG_REFS_ONLY 0x8 Include properties that are object references only.

Group 2

Constant Value Description
WBEM_FLAG_SYSTEM_ONLY 0x30 Limit the enumeration to system properties only.
WBEM_FLAG_NONSYSTEM_ONLY 0x40 Include local and propagated properties but exclude system properties from the enumeration.

For classes:

Constant Value Description
WBEM_FLAG_CLASS_OVERRIDES_ONLY 0x100 Limit the enumeration to properties overridden in the class definition.
WBEM_FLAG_CLASS_LOCAL_AND_OVERRIDES 0x100 Limit the enumeration to properties overridden in the current class definition and to new properties defined in the class.
WBEM_MASK_CLASS_CONDITION 0x300 A mask (rather than a flag) to apply against a lEnumFlags value to check if either WBEM_FLAG_CLASS_OVERRIDES_ONLY or WBEM_FLAG_CLASS_LOCAL_AND_OVERRIDES is set.
WBEM_FLAG_LOCAL_ONLY 0x10 Limit the enumeration to properties that are defined or modified in the class itself.
WBEM_FLAG_PROPAGATED_ONLY 0x20 Limit the enumeration to properties that are inherited from base classes.

For instances:

Constant Value Description
WBEM_FLAG_LOCAL_ONLY 0x10 Limit the enumeration to properties that are defined or modified in the class itself.
WBEM_FLAG_PROPAGATED_ONLY 0x20 Limit the enumeration to properties that are inherited from base classes.

Requirements

Platforms: See System Requirements.

Header: WMINet_Utils.idl

.NET Framework Versions: Available since 4.7.2

See also