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IMDSPEnumStorage::Clone

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The Clone method creates another enumerator that contains the same enumeration state as the current one. This method must be implemented. It must not return WMDM_E_NOTSUPPORTED or E_NOTIMPL. For more information, see the second table under Implementing Service Providers.

Syntax

HRESULT Clone(
  IMDSPEnumStorage**  ppEnumStorage
);

Parameters

ppEnumStorage

[out]  Pointer to an IMDSPEnumStorage interface.

Return Values

The method returns an HRESULT. All the interface methods in Windows Media Device Manager and service provider can return any of the following classes of error codes:

  • Standard COM error codes
  • Windows error codes converted to HRESULT values
  • Windows Media Device Manager error codes

For a complete list of possible error codes, see Error Codes.

Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK The method succeeded.
E_INVALIDARG The ppEnumStorage parameter is an invalid or NULL pointer.
E_OUTOFMEMORY There is not enough memory to replicate this interface.
E_UNEXPECTED The interface was not retrieved from a valid origin.

Remarks

Using this function, a client can record a particular point in the enumeration sequence, and return to that point at a later time. The new enumerator supports the same interface as the original one.

Requirements

Header: Defined in wmsp.idl.

Library: mssachlp.lib

See Also