MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties
Property group: Initialization
Property set: DBPROPSET_DBINIT
Type: VT_BSTR
Typical R/W: R/W
Description: Password
Indicates the password to be used when connecting to the data source object or enumerator. When the value of this property is retrieved with IDBProperties::GetProperties, the provider might return a mask such as "******" or an empty string instead of the actual password. The password is still set internally and is used when IDBInitialize::Initialize is called.