MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties
Property group: Column
Property set: DBPROPSET_COLUMN
Type: VT_BOOL
Typical R/W: R/W
Description: Nullable
Indicates whether or not the consumer can set the column to NULL.
| Value | Meaning |
| VARIANT_TRUE | The consumer can set the column to NULL. |
| VARIANT_FALSE | The consumer cannot set the column to NULL. |