If one is told something that is supposed to make him happy, when in fact it made him sad in the dream, such as being told in-dream that so and so has just arrived from-long journey, when in fact such person has just died, it means that his sadness will be dispelled and his sorrows removed. Feeling happy in-dream means sadness, sorrow, or crying. If one sees his friends happy in-dream, then it means happiness for him too.
More related Dreams in this H For Islamic Dreams interpretation Use search box and enter phrase (translation enabled in most languages )