IVssAdmin::QueryProviders method (vsadmin.h)

The QueryProviders method queries all registered providers.

Syntax

HRESULT QueryProviders(
  [out] IVssEnumObject **ppEnum
);

[out] ppEnum

The address of an IVssEnumObject interface pointer, which is initialized on return. Callers must release the interface.

This method can return one of these values.

Return code	Description
S_OK	The query was returned successfully.
E_INVALIDARG	One or more of the parameter values is not valid.
E_OUTOFMEMORY	Out of memory or other system resources.
E_ACCESSDENIED	The caller is not an administrator.
E_UNEXPECTED	An unexpected error occurred.
VSS_E_OBJECT_NOT_FOUND	An unexpected provider error occurred.
VSS_E_PROVIDER_VETO	Expected provider error. The provider logged the error in the event log. For more information, see Event and Error Handling Under VSS.
VSS_E_UNEXPECTED	Unexpected error. The error code is logged in the error log file. For more information, see Event and Error Handling Under VSS. Windows Server 2008, Windows Vista, Windows Server 2003 and Windows XP: This value is not supported until Windows Server 2008 R2 and Windows 7. E_UNEXPECTED is used instead.
VSS_E_UNEXPECTED_PROVIDER_ERROR	Unexpected provider error. The error code is logged in the error log. For more information, see Event and Error Handling Under VSS.

Calling the IVssEnumObject::Next method on the IVssEnumObject interface returned though the ppEnum parameter will return VSS_OBJECT_PROP structures containing a VSS_PROVIDER_PROP structure for each registered provider.

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	vsadmin.h