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: Increment
A VARIANT specifying the increment value for a numeric column.
Caution Consumers should specify a VARIANT subtype that corresponds to the type of the column; otherwise the provider may not convert the increment values correctly.