MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties
Property group: Column
Property set: DBPROPSET_COLUMN
Type: Any
Typical R/W: R/W
Description: Default
A VARIANT specifying the default value for an object—typically a domain or column. If the default value is a string, the string must be quoted so that it can be distinguished from an object of the same name. If the provider supports the PROVIDER_TYPES schema rowset, quoting should use the LITERAL_PREFIX and LITERAL_SUFFIX characters. For example, 'Salary' is a string, but Salary is an object, such as a column.