IDBCreateSession::CreateSession

OLE DB Programmer's Reference

Creates a new session from the data source object and returns the requested interface on the newly created session.

HRESULT CreateSession (    IUnknown     *pUnkOuter,    REFIID        riid,    IUnknown    **ppDBSession);

Parameters

pUnkOuter: [in]
A pointer to the controlling IUnknown interface if the new session is being created as part of an aggregate. It is a null pointer if the session is not part of an aggregate.
riid: [in]
The IID of the interface.
ppDBSession: [out]
A pointer to memory in which to return the interface pointer.

Return Code

S_OK: The method succeeded.
E_FAIL: A provider-specific error occurred.
E_INVALIDARG: ppDBSession was a null pointer.
E_NOINTERFACE: The session did not support the interface specified in riid.
E_OUTOFMEMORY: The provider did not have enough memory to create the session.
E_UNEXPECTED: The data source object was in an uninitialized state.
DB_E_NOAGGREGATION: pUnkOuter was not a null pointer, and the provider is an OLE DB 1.0 or 1.1 provider that does not support aggregation of the session object being created.
pUnkOuter was not a null pointer, and riid was not IID_IUnknown.
DB_E_OBJECTCREATIONLIMITREACHED: The maximum number of sessions supported by the provider has already been created. The consumer must release one or more currently held sessions before obtaining a new session object. This error is returned only by providers that have a fixed maximum number of sessions as returned by DBPROP_ACTIVESESSIONS. It is not returned due to other resource constraints, such as available memory (for which the provider returns E_OUTOFMEMORY).
DB_E_OBJECTOPEN: The provider would have to open a new connection to support the operation, and DBPROP_MULTIPLECONNECTIONS is set to VARIANT_FALSE.