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IWMDMEnumStorage::Next

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The Next method retrieves a pointer to the next IWMDMStorage or IWMDMDevice interface.

Syntax

HRESULT Next(
  ULONG  celt,
  IWMDMStorage**  ppStorage,
  ULONG*  pceltFetched
);

Parameters

celt

[in]  Number of storages requested.

ppStorage

[out]  Pointer to a storage device.

pceltFetched

[out]  Number of storage devices enumerated.

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.
S_FALSE No more storage devices exist.
E_INVALIDARG A parameter is invalid or is a NULL pointer.
E_FAIL An unspecified error occurred.

Remarks

Windows Media Device Manager delegates the storage enumeration to the corresponding service provider. For information on service provider storage enumeration, see the IMDSPEnumStorage interface.

The storage enumerator may not reflect the effect of media insertion and removal. In that case, the application should obtain a new storage enumerator object by calling IWMDMDevice::EnumStorage to get the refreshed list.

Requirements

Header: Defined in wmdm.idl.

Library: mssachlp.lib

See Also