MDAC 2.5 SDK - OLE DB Programmer's Reference
Appendix C: OLE DB Properties
Property group: Data Source Information
Property set: DBPROPSET_DATASOURCEINFO
Type: VT_I4
Typical R/W: R
Description: Maximum Open Chapters
Indicates the maximum number of chapters that can be open at any time.
If a chapter must be released before a new chapter can be opened, this value is 1; if the provider has no limit on the number of open chapters or does not support chapters, this value is 0.