On a 1099-DIV form you receive...box 2a Cap Gains are Only long-term and are treated as such (usually from Mutual fund distributions). Short term gains are added into box 1a, but will not be included in box 1b.
(IF you don't have your 1099-DIV yet, you need to wait for it...the 1a and 1b values can be all over the map...as well as the other boxes...guessing yourself can be hazardous)