MDAC 2.5 SDK - OLE DB Programmer's Reference
OLE DB Interfaces

IDBCreateSession::CreateSession

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.