Encapsulates a set of filter comparison operations to be evaluated together as a group, when paired with FilterGroupEnd(). Call FilterGroupMarker() to identify the group, then call FilterGroupBegin to start a group. Call the desired filter tokens to build up the group, and then call FilterGroupEnd to terminate the group.
AFTKN_FILTER_GROUP_BEGIN or 840
VOID FilterGroupBegin(ENUM FilterHandleType; ENUM FilterOperator)
Unique filter identifier: