IFreeBusyData::EnumBlocks [Outlook 2003 API Reference]
Gets an interface for a user that enumerates free/busy blocks of data within a specified time range.
HRESULT EnumBlocks( IEnumFBBlock **ppenumfb, FILETIME ftmStart, FILETIME ftmEnd );
[out] Interface to enumerate free/busy blocks.
[in] Start time for enumeration. It is expressed in FILETIME.
[in] End time for enumeration. It is expressed in FILETIME.
Used to indicate the time range of calendar items for which to retrieve details. The values of ftmStart and ftmEnd are cached and returned in a subsequent call of IFreeBusyData::GetFBPublishRange.
A free/busy provider can also subsequently use the returned IEnumFBBlock interface to access the enumeration.