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

DBPROP_INIT_ASYNCH

Property group: Initialization

Property set: DBPROPSET_DBINIT

Type: VT_I4

Typical R/W: R/W

Description: Asynchronous Processing

A bitmask specifying the asynchronous processing performed on the data source object. The following flag can be set:

DBPROPVAL_ASYNCH_INITIALIZE: IDBInitialize::Initialize returns immediately, but the actual initialization of the data source object is done asynchronously. The data source object behaves as an uninitialized data source object prior to completing the initialization process, except that any call to IDBInitialize returns E_UNEXPECTED.

If no bits are set (the default), IDBInitialize::Initialize does not return until the data source object is completely initialized.