CTimeSpan operator –( CTimeSpan timeSpan ) const;
CTimeSpan operator +( CTimeSpan timeSpan ) const;
These two operators allow you to add and subtract CTimeSpans to and from each other.
CTimeSpan ts1( 3, 1, 5, 12 ); // 3 days, 1 hour, 5 min, and 12 sec
CTimeSpan ts2( 100 ); // 100 seconds
CTimeSpan ts3 = ts1 + ts2;
ASSERT( ts3.GetSeconds() == 52 ); // 6 min, 52 sec