MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties
Property group: View
Property set: DBPROPSET_VIEW
Type: VT_I4
Typical R/W: R
Description: Maximum Sort Columns
Indicates the maximum number of columns that can be supported in a View Sort. If there is no specified limit or the limit is unknown, this value is set to zero.
This value applies only to the number of sort columns that can be specified in a call to IViewSort::SetSortOrder; it does not imply the maximum number of columns that can be used to sort in a command.