IVdsService::QueryProviders method (vds.h)

[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]

Returns an enumeration object containing a list of the hardware and software providers known to VDS.

Syntax

HRESULT QueryProviders(
  DWORD          masks,
  IEnumVdsObject **ppEnum
);

Parameters

masks

The provider mask enumerated by VDS_QUERY_PROVIDER_FLAG. Callers can specify a software provider mask, a hardware provider mask, or both.

ppEnum

The address of an IEnumVdsObject interface pointer that can be used to enumerate the providers as provider objects. For more information, see Working with Enumeration Objects. Callers must release the interface and each of the provider objects when they are no longer needed by calling the IUnknown::Release method.

Return value

This method can return standard HRESULT values, such as E_INVALIDARG or E_OUTOFMEMORY, and VDS-specific return values. It can also return converted system error codes using the HRESULT_FROM_WIN32 macro. Errors can originate from VDS itself or from the underlying VDS provider that is being used. Possible return values include the following.

Return code/value Description
S_OK
The enumeration is returned successfully.
VDS_E_INITIALIZED_FAILED
0x80042401L
VDS failed to initialize. If an application calls this method before the service finishes initializing, the method is blocked until the initialization completes. If the initialization fails, this error is returned.

Remarks

To determine the provider type for hardware providers, call the IVdsHwProviderType2::GetProviderType2 method or the IVdsHwProviderType::GetProviderType method for each provider object.

Requirements

   
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header vds.h
Library Uuid.lib

See also

IEnumVdsObject

IVdsService

VDS_HWPROVIDER_TYPE

VDS_QUERY_PROVIDER_FLAG