first get meetingUniqueID from listMeeting,
schedule_meeting_item = m_pPreMeetingService->CreateEditMeetingItem( meetingUniqueID );
schedule_meeting_item->SetMeetingTopic( topic );
schedule_meeting_item->SelectStartTime( starttime );
schedule_meeting_item->SetDurationInMinutes( minutes );
result = m_pPreMeetingService->EditMeeting(schedule_meeting_item);
Is my code wrong?