MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties

DBPROP_BYREFACCESSORS

Property group: Data Source Information

Property set: DBPROPSET_DATASOURCEINFO

Type: VT_BOOL

Typical R/W: R

Description: Pass By Ref Accessors

Indicates whether the provider supports the DBACCESSOR_PASSBYREF flag in IAccessor::CreateAccessor. This applies both to row and to parameter accessors.