MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties

DBPROP_NULLCOLLATION

Property group: Data Source Information

Property set: DBPROPSET_DATASOURCEINFO

Type: VT_I4

Typical R/W: R

Description: NULL Collation Order

Indicates where NULLs are sorted in a list. One of the following:

• DBPROPVAL_NC_END—NULLs are sorted at the end of the list, regardless of the sort order.
  
  
• DBPROPVAL_NC_HIGH—NULLs are sorted at the high end of the list.
  
  
• DBPROPVAL_NC_LOW—NULLs are sorted at the low end of the list.
  
  
• DBPROPVAL_NC_START—NULLs are sorted at the start of the list, regardless of the sort order.